I've never had jutter problems playing 23.976fps on my 60Hz LCD monitor, so that's rather interesting. The jutter problem I've had though, is when I'm forced to re-encode 23.976fps to 25fps, because this program won't let me keep my original settings. Even then, it works fine on my monitor, but jutters when played on the DVD player using a CRT tv.

But that's another story. Is it only that specific monitor, or that specific computer? (I doubt I can help, but just out of curiosity)