I have a Galaxy S Vibrant i9000m from Bell in Canada and I flashed the bionix-final-stock rom on it and following problems happened:
1) When phone is connected to usb, it reboots and reboots and reboots and reboots (you get the point).
2) I have no audio now (except when i receive a call)
3) Vol. up and down are inverted
4) When headphones are connected, phone acts like there's no headphones connected and when there is no headphones connected, it acts like there is headphones connected. This is basically the no-audio problem.

I restored my old (stock) rom using clockworkmod and the problem still persists. Also flashed another different rom and again the same thing. Any help would be greatly appreciated.