Some KM sharing tools are known to have these problems. Click too fast and poof there you have some abrupt mouse movement.

I have seen it with Synergy (not the wild spin thingy, just the I don't know where I'm at anymore and move some while you hold your right mouse button) and Octopus. Don't remember if I had this with multiplicity. And don't know about kavoom since I have not tried this yet.