weird problem with CD-drive eject

[Nirmal Govind <nirmalg@psu.edu>]

Hi.. I've started experiencing a weird problem with the Combo drive in my 
ibook.. for some reason, it keeps getting ejected.. I think the Shift key 
triggered it but once it starts, an eject "process" seems to be constantly 
running (I can see this with top, the PID keeps changing every second or 
so).. so even if I close the drive, it will eject in a few seconds on its 
own.. has anyone come across something like this? I'm not sure what triggered 
this behavior all of a sudden today cos I didn't have any trouble till now.. 

Thanks,
nirmal