Could this be a Windows 7 SP1 issue? I upgraded to SP1 as well as 1.1.3 on the same weekend.
Nope, I use XP - in fact, I tried win7 - but it was too sluggish and bloated even after disabling some of the indexing & snooping "features".
The XP is a clean installed XP3 - also, a fresh install XP3+MP1.1.3 (upgraded motherboard recently) did not help.