Tried it again just now; when it lost the connection dmesg revealed
[ 3539.119471] gvfsd-smb[15727]: segfault at 14 ip b7177373 sp bfc7cb50 error 4 in libgvfsdaemon.so[b7169000+23000]
at the end of the log. Looks like you're right that it's a gvfsd problem. I've only observed it with rhythmbox; on the other hand I've probably not had anything else making heavy use of a share while running 12.04, just the occasional file copy of a podcast.
Tried it again just now; when it lost the connection dmesg revealed so[b7169000+ 23000]
[ 3539.119471] gvfsd-smb[15727]: segfault at 14 ip b7177373 sp bfc7cb50 error 4 in libgvfsdaemon.
at the end of the log. Looks like you're right that it's a gvfsd problem. I've only observed it with rhythmbox; on the other hand I've probably not had anything else making heavy use of a share while running 12.04, just the occasional file copy of a podcast.