Really slow scans and no Insight popups in FF3.6.6

Windows 7 Home Premium 64-bit

NAV 2010 v17.7.0.12

Firefox 3.6.6

 

Upgraded Firefox to 3.6.6 recently. When I download files (any files - .zip archives, PDF, .exe, etc), the "scanning for viruses" message in the FF download window stays active for a long time (in the 30 second range) before finally succeeding. And I no longer get any Norton File Insight popups for downloaded executables.

 

Browser Integration, Download Intelligence, and Download Insight Notifications settings are all On.

 

When I look at my History, the last entry in my Download Insight log is from July 1, 2010.

 

Thoughts?