There was once a post on Milworm listing the Plaza as having an exploit it is all of a sudden not posted? Well that either means it was not an exploit or was reported as FIXED. But for more information on exploits you will find google a good place to start heres a bit of a refined and interesting search result......
http://www.stumbleupon.com/tag/exploits/
http://www.securityfocus.com/swsearc...shlastmodified
I for one am not completely convinced there is anything seriously wrong other than the staff taking the link down. And one report of a hack IIRC?
If you do not have this already installed I would just wait for the new release to come out.
And if you already have this installed I would do the repairs listed or the one that was posted as a fixed version. Good luck all.