I actually encountered the same exact thing with -- I tried to look it up but I couldn't find anything on it. It happens frequently, but not always. It almost looks like the stool has fumes of oil coming off of it if that makes any sense. It's pretty nasty, but the stool itself is still solid.
I'm glad that someone else is having the same experience - it kind of alarmed me the first time it happened, but seeing as I'm on a cocktail of so many different supps, I assumed that it was normal since 'bowel complications' are so common.