If you put a slash in front of your post and nothing shows up then you have my problem that I have. Just use \ instead of / perhaps or not putting the symbol in front of your post. If not, then just don't use the symbol.
If you can't use the symbol anymore just use ( TEXT HERE ) for your thoughts, and (( TEXT HERE )) for OOC talking. That's what I do, at least.
Not sure how to fix it exactly. Could be a certain computer problem with a type of computer on FH or something with FH, but anyway, those are my suggestions.