Comment 10 for bug 1077696

I've seen this problem on a fresh install of 12.10. It doesn't happen often but when it does its impossible for me to kill vlc or unmount the share, I have to log out and back in.

I've found a good workaround to avoid the bug completely though (this work around also fixes a separate problem with vlc, where videos played from mounted smb shares do not respect VLC's network buffer setting, because vlc treats videos opened via gvfs as local files). Instead of double clicking the video in nautilus, drag and drop the video into vlc. Doing this uses vlc's inbuilt smb access module instead of gvfs. Note: for this to work you probably need to go into vlc's settings and fill in your smb username and password (tools > preferences > all > input and codecs > access modules > SMB)