Running the updater (under Windows) with "-auto -console", I can watch its actions a bit more detailed, so I was able to spot the following error message:
vfs.cfg (2.00 KB) 0%....25%....50%....75%....100% (4 KB/s)
MD5 sum doesn't match after downloading vfs.cfg. Skipping
"How important" is this update? Can you provide a direct link, or the differences to apply?