Cant help directly as I have not tried it.. But just thought i'd point something out.. Just incase you happen to be using the Macam USB camera driver, this driver does not yet work in 10.3
Indeed if a cam is plugged in, it will cause kernal panics/a crash on start up.
Macam developer has been contacted, but as yet, no response.
Ioxperts driver is apparently fine though.