Celtkin
☠️ Banned ☠️
I can confirm that it doesn't happen in Safari 3.0.4 for Windows. It does happen in Firefox 2.0.0.12 and Firefox 3 Beta 3 on Windows. (I'm not even going to bother with IE: it's friggin' IE!)
I tracked down the problem. If you use Firefox and are using the WYSIWYG editor in your UserCP, the text formats as orange as you are composing. If you select the "Standard Editor" with extended formatting controls (middle option from the pulldown), the problem will go away.