Vidalia specifies absolute path in ControlPortWriteToFile option
A TBB user reports that when TBB-Tor saves its torrc, it includes an absolute path in the value of the ControlPortWriteToFile option. This may disclose a filesystem location from which a particular copy of TBB has been run.
I have tested Tor to determine whether it expands relative paths; it does not, so TBB-Vidalia must be specifying an absolute path.