I sent you the info you requested via email. Thanks for the followup.
I did this test, which leads me to believe that the stalls are being caused by the internal browser:
1. Closed all tray apps except ZoneAlarm and Norton AV 10 (Corporate version).
2. Closed my database and opened a new, empty one.
3. Changed the options back to the settings that have been causing problems.
4. Added one web page:
http://news.yahoo.com/s/ap/20050923/..._explosion_hk1
Now I can make the lockups occur at will. If I click on the web page in UR, it will lockup for about 20 seconds with all the symptoms previously mentioned. It does, in this case, eventually recover and render the page. However, on my regular db, it will stay locked up forever.