I'm using Avast for Mac 2.74RO (Service Kit 1.41) on a MacBook running OSX 10.5.6. Recently Avast has crashed twice. I have it set to scan several folders (usernames and applications) by default. Recently it started scans and seemed to be trying to scan everything, including external hard drives (which I occasionally do manually). The file count will climb into the many millions, it will give an error message that it was unable to scan one of the external drives, and then it will quit. This has been happening only recently, and I don't know if it started after an Avast update or the update to 10.5.6 (or if either of them is the culprit). Anyone else having this problem? Any advice? Thanks.