I was working and noticed that FireFox 3 was very sluggish. Up until today, I have had no such issues with FireFox 3 so I was wondering what the heck was going on. There were only 3 tabs open, Mobile Me, FriendFeed, and the web site for work that I was currently developing, not enough to cause any memory issues.

So, I opened Task Manager and saw this:

Why is FireFox using 41% of my processor?!?!?

I logged out of MobileMe and FireFox immediately dropped to using 0-2% of the processor. It would appear that MobileMe is constantly doing something in the background that requires a lot of CPU. Sounds like a bug to me, it shouldn't be using that much CPU to do server updates.