Illegal nickname "PPriv@last-listed" in family line
I'm using the current(?) version of the Tor Browser bundle (version 2.3.25-10 I think; how do I find out which version I am running?) on GNU/Linux.
After a system crash (failing to shut down properly - laptop battery ran out) while tor browser was running, I was unable to restart Tor browser again after reboot. I got two error messages from vidalia; one saying that vidalia was unable to connect to the control port, the other saying that the tor process had exited immediately after launch. The last line in the tor logfile was a warning:
[Warning] Illegal nickname "PPriv@last-listed" in family line
Grepping through the Data/Tor/ directory, I found such a line in the cached-microdescs file. After deleting this file I was able to launch tor browser again.
Tor browser/vidalia should recover from this kind of error automatically, without manual user intervention.