Changes:
This is a minor update that adds a new effect, improves certain parts of the user interface, and fixes a few minor bugs.
* New: Pencil Sketch effect
* New: In Windows Vista, the new-style Save/Open dialogs are used
* Changed: The View->Units, Image->Flip, Image->Rotate, and Layers->Flip submenus have been "flattened" (their commands were moved out into the View, Image, Image, and Layers menus respectively)
* Improved: Download size reduced by about 300 KB by using PNGOUT
* Improved: Some uses of confusing "MessageBox" style dialogs have been changed to a much friendlier "TaskDialog" style interface
* Improved: When changing the language, Paint.NET can now restart itself automatically
* Improved: Performance for Move Selected Pixels tool for quad-core systems
* Removed: The "Clear History" button has been removed because it was not very useful
* Fixed: Sometimes the Colors window would get "lost" between sessions of Paint.NET
* Fixed: Stack-overflow crash when using certain effects, such as Gaussian Blur, on very large images with certain settings (such as a 200 pixel radius)
* Fixed: When cancelling the multi-image Unsaved Changes dialog, the input focus was sometimes confused
* Changed: Renamed PdnLib.dll to PaintDotNet.Core.dll
* Fixed: Very rare race condition in background thumbnail renderer
