Hi Eric,
I have reverted to Eclipse 3.3 and the latest GWT Designer build (200810111047) for that version rather than run Ganymede -- it was too unstable.
Everything seems to work great as long as I pick and place from the widget pallet or write code directly, but once I try to resize any widget or copy and paste widgets from one location to another in design mode, GWT Designer pops a huge error dialog with all the code that it couldn't write to the source file. Here is a link to the .metadata log file entries that correspond to the error(s).
http://www.morris-technical-solutions.com/10_15_2008_stacktrace.txt
Perhaps Konstantin can spot this as indicative of a certain supporting lib being missing or something, though I think that I have the latest of everything.
Let me know what other info I can supply.
Cheers,
Jason
Morris Technical Solutions LLC