Paint.NET 2.6 final was just made available for download. If you're currently using Paint.NET and it's stable enough for day to day use, you might want to wait (or at least save the install for the build you're using). It's crashing quite a lot for me right now, doing basic things like trying to paste screen shots. Not sure why. From the crash log:

Exception details:
System.ApplicationException: Traced code path: 1 2 6 8 9 10 11 12 13 14 ---> System.NullReferenceException: Object reference not set to an instance of an object.
at PaintDotNet.MainForm.menuFileNew_Click(Object sender, EventArgs e)
--- End of inner exception stack trace ---
at PaintDotNet.MainForm.menuFileNew_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met)
at System.Windows.Forms.ToolStripMenuItem.ProcessMnemonic(Char charCode)
at System.Windows.Forms.ToolStrip.ProcessMnemonicInternal(Char charCode)
at System.Windows.Forms.ToolStrip.ProcessMnemonic(Char charCode)
at System.Windows.Forms.ToolStripDropDown.ProcessMnemonic(Char charCode)
at System.Windows.Forms.ToolStripDropDown.ProcessDialogChar(Char charCode)
at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
------------------------------------------------------------------------------
Crash log for Paint.NET v2.6 (Final Release build 2.6.2244.18680)
Time of crash: 2/26/2006 8:44:56 AM
OS version: 5.1.2600.131072 Service Pack 2 Workstation x86
.NET Framework version: 2.0.50727.42 x86
Processor count: 1
Physical memory: 383 MB

Exception details:
System.InvalidOperationException: BufferedGraphicsContext cannot be disposed of because a buffer operation is currently in progress.
at System.Drawing.BufferedGraphicsContext.Dispose(Boolean disposing)
at System.Drawing.BufferedGraphicsContext.Dispose()
at System.Drawing.BufferedGraphicsContext.AllocBufferInTempManager(Graphics targetGraphics, IntPtr targetDC, Rectangle targetRectangle)
at System.Drawing.BufferedGraphicsContext.Allocate(IntPtr targetDC, Rectangle targetRectangle)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at PaintDotNet.ControlShadow.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)