Another revision of MSDN Search went into Labs tonight - we think we've got the script errors beaten and can no-longer repro the errors. I'll nod my head to Nikhil Kothari's Web Dev Helper as a great tool to watch browser interaction...
A few improvements in the UI behaviour switching tabs, and cleaned up stylesheets quite a bit, though there is still more work to do in there. Quite some back-office work put in to monitor performance and errors.
Feedback and comments as always welcome on all aspects of the project.
Steve Butler
Software Architect
MSDN & Technet Product Group
( Email me... )