Don't mean to hijack this and the OP already got his answer and this seems to be a good place to ask.
If you swipe out a work that's not in the dictionary, flext9 makes an error noise. Under 2.2 on my DroidX, the noise was just for a second. Under 2.3, it's making a noise that lasts for 20 seconds or so. Is there any way to disable that?