Comment 40 for bug 31471

There is another bug on Launchpad for the same issue on other software : https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/304345

I confirm it's a big problem when you often use network shares.
One can mount them permanently in fstab, of course, but it only works if this share is always up.
In other contexts, like a home network or small organization (with a few standard PCs and no central serve), fstab is not adequate (mouting fails if the network share is not up at startup time)

Another workaround I found is to use the software package gigolo : see http://www.borpin.co.uk/2011/03/29/map-network-drive-in-ubuntu-again/
If you put a bookmark on ~/.gvfs (as suggested above), it can help mounting shares automatically when a remote PC is up.
I did not test it a lot, though.