If you use Tapatalk to connect to your forum, please read the following thread on SMF about a security issue that apparently wasn't communicated to Tapatalk customers:
http://www.simplemachines.org/community/index.php?topic=522911.0
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If you're site is using TapaTalk, update now! There was a security flaw found in TapaTalk and they decided NOT to inform anyone or advise anyone to update their files.
I did not find out until today, when I just happen to scroll over and found a post about it.
They even publicly admit to patching it silently, but NOT issuing a release or any notice telling people they should replace their files (because they did not even bother changing the version number either). :o