The same sympthoms of applications crashing and blocked to save data/documents to disk were experienced by me today again.
I suspect of a memory leak in 6.0.1203.
I will be monitoring the computer with “poolmon -a” (http://public.avast.com/~kurtin/poolmon.exe) to see allocated paged/nonpaged memory by their tags (and post poolmon’s screenshot later).
If anybody finds system running “out of memory”, can follow also here: http://forum.avast.com/index.php?topic=63266.0 or http://forum.avast.com/index.php?topic=59738.msg504692#msg504692.