There are some known bugs in the spell check software but unforetunately no fix has been offered up. I've emailed the author several times but no response. It's the best option that we have and it works for most of the people most of the time. A few things you can do - 1 is to copy and paste your text into notepad or the like before you run the spell check in case it loses your text. Second is if the text is lost sometimes you can just hit the back button and get it back. 3rd is you can post it and then edit the message and run the spell check - if it's lost you just go back to the thread and edit it again. I'll keep looking for fixes.
-Steve St. Laurent
Webmaster