Error while opening a file with collapsed region nodes

SharpDevelop Version : 4.3.0.9338-alpha-5f770be6
.NET Version         : 4.0.30319.296
OS Version           : Microsoft Windows NT 5.1.2600 Dodatek Service Pack 3
Current culture      : Polish (Poland) (pl-PL)
Current UI language  : en
Working Set Memory   : 127720kb
GC Heap Memory       : 54786kb

Unhandled WPF exception
Exception thrown:
System.InvalidOperationException: All lines collapsed but visual pos different - height tree inconsistency?
   at ICSharpCode.AvalonEdit.Rendering.TextView.BuildVisualLine(DocumentLine documentLine, TextRunProperties globalTextRunProperties, VisualLineTextParagraphProperties paragraphProperties, VisualLineElementGenerator[ elementGeneratorsArray, IVisualLineTransformer[ lineTransformersArray, Size availableSize)
   at ICSharpCode.AvalonEdit.Rendering.TextView.CreateAndMeasureVisualLines(Size availableSize)
   at ICSharpCode.AvalonEdit.Rendering.TextView.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.DockPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at Microsoft.Windows.Themes.ClassicBorderDecorator.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at AvalonDock.ResizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at AvalonDock.ResizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at AvalonDock.ResizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at AvalonDock.ResizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at AvalonDock.ResizingPanel.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV)
   at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Control.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.DockPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
   at System.Windows.Controls.ContentPresenter.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Documents.AdornerDecorator.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.Border.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Window.MeasureOverrideHelper(Size constraint)
   at System.Windows.Window.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
   at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork()
   at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

---- Recent log messages:
12:13:12.578 [1] DEBUG - ActiveContentChanged to ICSharpCode.SharpDevelop.Project.ProjectBrowserPad
12:13:12.921 [1] INFO - Open file C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs
12:13:12.937 [1] DEBUG - Activated feature 'ICSharpCode.AvalonEdit.AddIn.AvalonEditViewContent/open.cs'
12:13:13.218 [1] DEBUG - Trying to restore memento of '[AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs]' from key '1e13ec5:C:\DOCUMENTS AND SETTINGS\ADMIN\MOJE DOKUMENTY\REPOZYTORIUM\BRANCHES\INVESTCOM\INVESTCOM.MIGRATOR\NODE.CS'
12:13:13.234 [1] DEBUG - ActiveContentChanged to
12:13:13.234 [1] DEBUG - ActiveWorkbenchWindowChanged to [AvalonWorkbenchWindow: Node.cs]
12:13:13.234 [1] DEBUG - ActiveViewContentChanged to
12:13:13.250 [1] DEBUG - ParseInformationUpdated C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs new!=null:True
12:13:13.250 [1] DEBUG - NavigationService
    ActiveViewContent: Node.cs
              Subview: ${res:FormsDesigner.DesignTabPages.SourceTabPage}
12:13:13.250 [1] DEBUG - ActiveViewContentChanged to [AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs]
12:13:13.250 [1] DEBUG - ActiveContentChanged to [AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs]
12:13:13.375 [1] DEBUG - ActiveContentChanged to ICSharpCode.SharpDevelop.Project.ProjectBrowserPad
12:13:13.390 [1] DEBUG - ActiveContentChanged to [AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Node.cs]
12:13:29.906 [1] DEBUG - ActiveContentChanged to ICSharpCode.SharpDevelop.Project.ProjectBrowserPad
12:13:30.250 [1] INFO - Open file C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Migrator.cs
12:13:30.265 [1] DEBUG - Activated feature 'ICSharpCode.AvalonEdit.AddIn.AvalonEditViewContent/open.cs'
12:13:30.453 [1] DEBUG - Trying to restore memento of '[AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Migrator.cs]' from key '1e13ec5:C:\DOCUMENTS AND SETTINGS\ADMIN\MOJE DOKUMENTY\REPOZYTORIUM\BRANCHES\INVESTCOM\INVESTCOM.MIGRATOR\MIGRATOR.CS'
12:13:30.484 [1] DEBUG - ActiveContentChanged to
12:13:30.484 [1] DEBUG - ActiveWorkbenchWindowChanged to [AvalonWorkbenchWindow: Migrator.cs]
12:13:30.484 [1] DEBUG - ActiveViewContentChanged to
12:13:30.484 [1] DEBUG - ParseInformationUpdated C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Migrator.cs new!=null:True
12:13:30.500 [1] DEBUG - NavigationService
    ActiveViewContent: Migrator.cs
              Subview: ${res:FormsDesigner.DesignTabPages.SourceTabPage}
12:13:30.500 [1] DEBUG - ActiveViewContentChanged to [AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Migrator.cs]
12:13:30.500 [1] DEBUG - ActiveContentChanged to [AvalonEditViewContent C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.Migrator\Migrator.cs]
12:18:48.203 [1] DEBUG - ActiveContentChanged to ICSharpCode.SharpDevelop.Project.ProjectBrowserPad

---- Post-error application state information:
Installed 3rd party AddIns: [AStyleAddin 3.1.4054.23192], [RemoveUnusedRef 1.0.0], [ThemeTool 0.0.0.0]
Workbench.ActiveContent: ICSharpCode.SharpDevelop.Project.ProjectBrowserPad
ProjectService.OpenSolution: [Solution: FileName=C:\Documents and Settings\Admin\Moje dokumenty\Repozytorium\branches\Investcom\Investcom.sln, HasProjects=True, ReadOnly=False]
ProjectService.CurrentProject: [CSharpProject: Investcom.Migrator]