Hi. I just installed SP 1 and now an add-in tool I have that was written with VB .net is causing ArcMap to crash when I use it. I took the tool out, removed the link to the folder where it is located and restarted ArcMap with a fresh mxd, added data to it and then loaded my add-in again. I was able to use the tool twice, then I started an edit session, tried to use the tool again and it crashed ArcMap. When I opened that mxd again and tried to use the tool, it crashed ArcMap immediately. This was working fine before I installed SP1, so I think I am going to remove it. Too bad - because SP1 did fix another annoying, but less so, issue I was having with having to uncheck "Stretch topology proportionately when moving a topology element" every time I open ArcMap and want to start editing topology.
Addendum: I checked the code for the add-in I am using, which I did not write, and it uses IDataStatistics. Based on Ernie's comments above, this is likely the cause of the problem I am having.