Yes, I did. And I was able to fix that issue.
To experiment more...
I stared at the AvastGUI while scanning to see in which path crashes. It crashed while scanning the WualaDrive path in my home folder. I added this path to the exclusions, and started a scan, and it didn't crash.
So I removed the exclusion and just added WualaDrive to the scan and Avast crashed. So I guess I found the problem.
This directory is added by Wuala's java based application (which I use).
http://wuala.comThank you for your help.