Q:

VS2010 repeatedly showing animated icon

Visual Studio 2010 is repeatedly showing this animated icon in the bottom right next to the "Ln" every 2 seconds.  And even if VS is minimized, it makes my cursor briefly show an hourglass every time.  Can someone tell me what this icon stands for? 

Edit:
Showing the icon during a build also.  Build icon is on left, mystery icon in middle.

A:

The icon seems to be related to Intellisense.  I noticed that vcpkgsrv.exe was starting and exiting quickly over and over.  Although I had a large project.sdf file, Intellisense was not working in my project.  
I found this KB from Microsoft related to VS2010 Intellisense issues on XP (I'm running XP).  When I installed the hotfix, the problem went away.
http://support.microsoft.com/kb/2526044

