Snap MBAM Pro on win7 with avast free 6.0.945 beta and no problems.
I also haven’t excluded any MBAM files or locations and the same in MBAM no avast folders excluded, though I would recommend excluding the c:\windows\temp_avast5_ folder where avast unpacks/places temp files it is going to scan.
add these exclusions in file system shield/ exclusions and settings/exclusions, you’ll probably have to copy and paste each one seperately, they might not be needed but they are here if you want to add them.
For fear of repeating myself, but it appears necessary.
I have MBAM Pro on my win7 netbook with avast 6.0.945 beta and I have excluded none of the MBAM folders or files, what I have done is exclude the c:\windows\temp_avast_ folder (if using avast 5 that would be the avast5 folder) so that the resident MBAM scanner doesn’t scan files that avast sends/unpacks files in this folder so it can scan them.
I have otherwise not had any problems and I tend not to pre-empt problems but rather react to them.