as I saw in a spam thread, it was indicated that "Message: pmppminh can only post plain text URLS until they have 500 rep. 115 URLS modified."
However, when the url had
before (
someimagelink[/img SomethingSomething http://www.google.com] for exemple ), the URL was still clickable (not that any of us would click it in that particular case but still an annoyance to see that it could be easily broken)
I still have a copy of the BBCode of the post somewhere if needed