Strange bright line at top of images

[cpsico]

At high shutter speeds (roughly over 1/500 of a second) an over exposed line appears and becomes more pronounced the higher the shutter speed. Do I have an inexpensive repair like a shutter or something more expensive? Has anyone ever had this problem before?

 

[cpsico]

It's called shutter bounce and apparently can be an issue on some 1 ds mark III cameras, sigh.....off to cps repairs