I've no problems on my own forum, perhaps because I'm a regular reader on the advice issued on the topic Preventing Spam
here at phpbb.
But one of the forums I subscribe to has been infiltrated in the last few days by a spammer who is PMing members with a link to a Viagara site. No big deal, but it's worth watching this loophole as something more sinister could be used as a link for the unwary.
Do a Google search using "profilicus profile" to see what I mean.
A question to those in the know, is this a bot?