What is in your Revit 2010 Add-ins tab? Can you post a screen shot to show us? We are trying to put together a picture of what a "typical" Add-ins tab looks like. We are aware that there a issues with the Add-ins tab: specifically related to scalability and context, and we want to improve it. If you do not mind sharing on a public site, you can email your screen shot directly to my Flickr page: firstname.lastname@example.org Feel free to comment here about your experience accessing tools from the Add-ins tab.
Addendum: as an experiment, I am embedding linking to the Flickr slideshow to create a bit of a feedback loop.