Didn't someone (perhaps even a Baker) say in another thread this issue was occurring in some of the previous versions as well?
Also I've had "sliver" issues since X2 but they were due to some other wackiness/poor editing technique.
It almost sounds like these new reports might be being caused by the splits being double triggered and just the natural finite mouse/cursor movement is occuring in between the first and second split/comp tool action.
I wonder if those experiencing this can check their Edit History and see if maybe two splits occurred when these slivers get created. That would almost semi confirm that theory.
However I have no freaking clue and am STILL on Foxboro (just been too busy/preoccupied to update).
Just some thoughts but would like to know what's up/what to expect.
Cheers.
Edit: ah yeah... I recall reading about the X-Fade factor. That kind of goes against my theory BUT might still be worth checking the edit history to see if that reveals any clues.
Like do whatever it is that's causing the slivers, make sure the sliver has presented itself, then check your History.