Update: I had some more spare time, so I fixed a few other problems.
##Whats new in version 1.3?
- Fix grid coordinate calculations when page scrolling is involved.
- Fix context menu popup on left click
- Support wider windows
##Whats new in version 1.2?
This is mostly a bugfix release with library updates.
- Updated to latest version of GWT (2.7)
- Updated drag and drop library
- Fixed some UI usability issues
Updating GWT and the drag and drop library seems to have fixed some of the bugs people were having.