You must have been trying to post thumbnails.... ? There shouldn't be any bold tags in there, and there were also a couple of URL tags. I think the reason it didn't work is because of the bold tags [B ] and [/B ]. I think that the bold tags probably came into play is because I'm guessing you probably copied the code from my FAQ post right? I made the tag codes bold in that post for emphasis. The WYSIWYG editor does funky things with text formatting tags that result in unpredictable things happening like what you see above. That's exactly why I don't use the WYSIWYG editor, but that's another story.... :roll:
Honestly, I think there is a simpler way to accomplish the thumbnail thing, rather than trying to type out the tags. Let me update the FAQ... I think I can make it a little clearer.