Some time after the SCO accusations that the Linux kernel would contain code owned by SCO, the Linux kernel people decided to setup a system for tracking the origin of patches. Unfortunately, this system isn't exactly faultproof. I've only submitted about 10 patches out of which three have been wrongly accredited. And because of GIT's use of hashes as identifiers, these mistakes do not get rectified.
Some time ago two patches of mine ended up in 188.8.131.52 stating someone else being the author. Now, I just noticed another patch of mine ended up somewhere in 2.6.x wrongly accrediting someone else.