Hi,
This may be related to several other posts.
I’ve upgraded an install from the beta version to 2.1.1 Build: 20101020 and the Publish/Edit forms don’t display. They include custom fields, field types such as wygwam, channel images and matrix. The tabs have also been customized. Heard about similar issues some time ago, but thought it had been fixed.
MX Google Maps caused some errors but has been removed and uninstalled. Yet, I had to do it manually in the db. Don’t know if it still can cause any issues.