I do not have the ability to get a screen capture from a DVD, so I will have to try and describe what I saw. I just finished watching the Empire of Dreams documentary on the OT Extras DVD. About 2 hours into the documentary they are talking about Han Solo in the Carbon Chamber, and there is a shot of Harrison Ford standing in the chamber area.
At 2:01:57 Boba's RF and JP Missle enter the bottom of the frame, and move back and forth a bit. For a few frames of the shot, I saw what appeared to be a blue light comming from the bottom of the RF. It looked similar to what people around here have done with their RF's, by putting an LED behind a plexiglass window. The light seemed to turn on and off based on the position of the RF, almost like a mecury switch.
Will someone else check this out, and let me know if I was seeing things or not? If you have the ability to post a screen shot, that would be great.