That's a problem with your scripting (programming code string is corrupt) It's a Boolean (true, false error) I think, I'm a very amateur programmer and I have seen it before. Maybe some other good computer types can help! BTW the spell check doesn't always work for me!
Mike, I think I've found the problem with the spell-checker error.
I'd suspected it for a while now (making enough posts to see the difference ), but I think the use of the "Quote Post" function is what is throwing things off. I typed out a post and noticed the spell checker was off, so I cancelled it and cut the quoted part out of my post. Low and behold the spell-checker started to work properly, not moving correctly spelled words over a few spaces and leaving part of the original misspelled word.
Make sure you're on the latest version, which is currently 1.1 Beta 2. Not sure what version you're running, as you appear to have removed the copyright/version info from your forums. I believe this is a breach of the EULA, so you may want to consider adding it back.
You're right, 1.1 Beta 2 is only for Charter Members, sorry about that. (We're a Charter Member site.) The current public version then is 1.0.3, and I believe some spell checker fixes are coming in the 1.1 stream for you.
WRT copyright, I found this: http://www.simplemachines.org/community/index.php?topic=34184.0
When using the spell check today, I noticed that it added a letter to the word that it corrected i.e. "ssentence"and then it would take the space out from between the next word, i.e. "ssentenceto". Is this just me or am I finally loosing it?