I am using avast! 1.7.0 Professional Edition on a Windows 7 SP1 x64 environment. Up until three days ago, I have had no problems and avast! was working perfectly. Then, on June 29th on the U.S. side of the dateline, avast! requested an update to program version 1.7.0.1451. Immediately after that update was completed, my web browser could not connect to my provider, and my E-mail client could no longer connect to its mail server. The problem was caused by a conflict with Online Armor Premium Edition, Version 5.5.0 (a product that, by the way, co-existed with avast! before the update to version 1.7.0.1451). The fix is to go into Online Armor's "Options" menu, then click on the "Exclusions" tab and add the avast! program folder. This inhibits Online Armor from bumping into avast!, and so avoids the conflict. You may want to publish this warning in case someone else using the same software combination suffers the same problem.
Now, I've discovered another problem that occurred after one of the automatic updates. I found that my web browser (Mozilla Firefox Version 13.1) hung as soon as it engaged a Java script. Ironically, the problem isn't with the Script shield, but with the Behavioral shield (I proved it by getting the browser to work correctly with the shield off and scripts enabled, and with the shield on and scripts disabled. However, it won't work with both scripts and Behavioral shield enabled). Thus, I've now had to turn off the Behavioral Shield and reduce some of avast!'s protection. I opened a ticket for both problems a couple of days ago but have received no real help. Considering that I paid for the Professional Edition of avast!, I am very disappointed.....