I've been trying to get signed up with Passport.net so that I can use this VisualStudio/feedback method. IEXPLORE starts grabbing most of the CPU and then IEXPLORE memory starts incrementing up to 300-400K. Then the memory goes back down and starts up again. This cycle repeats a few times.
I made *.PASSPORT.NET a trusted site and then rebooted my computer. (Everything seemed slow.)
I saw some of the same slowness and memory gobbling behavior afterwards but eventually I got set up with Passport.