There's a new version of TransparentDock out. And this may be your problem:
(That's from the VersionTracker comments about TransparentDock)kfkel
Oct 1, 2001
Please note: For all those seeing the "The application TransparentDock has unexpectedly quit...", some brilliant detective work - thanks Roy! revealed that some third party OS X extensions may be incompatible with AppleScript in OS X 10.1. Specifically, AppleScripts will not run if the Toast file "ToastVideoCDSupport.component" is in its home in /Library/Quicktime (if you happen to be using Toast). Simply removing the file allowed the script to run. I'm looking into other possible incompatibilities... thanks And Ken, please drop me an email with some more info on when the error occurs in the script - I've never seen that one before, but I'd like to iron it out.