i had the same problem. only happened in first gear every so often and it started becoming more and more noticeable. finally took it in and my clutch was pretty much done and i had to get a new one.
<img src='http://i5.photobucket.com/albums/y196/velocity318/test2.jpg' border='0' alt='user posted image' />
Kenwood KDC-MP822 h/u, H&R race springs, Bilstein sport shocks, Rondell 17x8 wheels, Toyo proxes 225/45, TMS camber arms, rolled rear fenders, smoked corners, smoked sidemarkers, smoked taillights, Cosmo cold air intake, ///M pedals, clutch stop, parking light delete, license plate delete, black roundel overlays, tint