I'm not sure if this has been mentioned before, but I've noticed a problem that occurs when previewing messages before sending them. Everywhere I have an apostrophe such as in the word I'm for example, after clicking the preview button, the message is previewd correctly, but in the text box where I initially typed the message a / appears before every apostrophe. So the word I'm becomes I/'m. (and if I didn't remove those /s they would be in the message when sent)
I don't have this problem when posting, only when sending PMs.