Rebuild SystemUIServer's database I'm not completely sure what happened, but in Console I get the following errors repeating endlessly every few minutes:

28/07/2013 12:32:10.009 SystemUIServer[304]: Unknown error finalizing or resetting statement (11: database disk image is malformed)
28/07/2013 12:32:10.009 SystemUIServer[304]: DB Query: begin exclusive transaction
28/07/2013 12:32:10.018 SystemUIServer[304]: Error calling sqlite3_step (1: cannot commit - no transaction is active) SQLITE_ERROR
28/07/2013 12:32:10.019 SystemUIServer[304]: DB Query: commit transaction
28/07/2013 12:32:10.019 SystemUIServer[304]: Unknown error finalizing or resetting statement (1: cannot commit - no transaction is active)
28/07/2013 12:32:10.019 SystemUIServer[304]: DB Query: commit transaction


It seems like some database that SystemUIServer uses has become corrupted, and I'm looking for a way to repair it or, more likely, force it to be re-created. I've had a little poke around in /private/var/db but I haven't seen anything that looks likely, and of course the last thing I want to do is try moving/deleting things at random as I'm pretty much guaranteed to make things worse :)

Currently the errors don't seem to interfere with anything, but I figure if this database is corrupt then I should really fix it if I can. At the very least so it stops filling my console with thousands of message a day!
Have you got iStat Menus 4 installed? This thread identified the iStat Menus network module as the cause of the problem. Another one blames the CPU module.