SMS compose error: unable to insert text. Maximum limit reached

[tedtlogan]

I did a hard reset on my phone and started redoing some registry hacks, and I notice I get this error on composing new text messages now. I can then start typing a message, but i can't see what im typing till I hit preview.

Any ideas which registry entry this would have been,, so I can fix?

threaded sms works fine, as i can type back to it fine, it's just the new compose window text.