Hey, just tried the latest beta and Fences is BACK on my machine. Most interestingly, the debug feature works. Before, when I tried to Edit Settings, the window would appear, then crash and go away. Now, the window appears, a crash/debug window arrives, and as long as I don't hit OK in the debug window, I can finally edit/change my Fences settings. So, that helps me workaround the fact that couldn't edit settings before. 
Here's the latest debug message text from the logfile. I emailed you the previous logfile per your request.
Version: 0.96.1505
Timestamp: 2/1/2009 6:17:32 PM
Exception: Value of '303' is not valid for 'ImageSize.Width'. 'ImageSize.Width' should be between 1 and 256.
Parameter name: ImageSize
Stack Trace:
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
at DesktopDockUI.Dialogs.Panes.ToolsPaneA.RefreshSnapshots()
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
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