Hadn't heard of this particular problem, but my littlest son, T, is now in the hospital due to an ear infection gone bad. A simple ear infection turned into an abscess (which I guess potentially threatens his CI). I'll have to post more later, as right now I'm beat from being at the ER, etc. But, I'll give you all the (gory) details tomorrow, so you will all know what to watch for. For the record, I really don't think it's all that common, but who knows :)
He will go into the operating room tomorrow to have it all cleaned out, so I'll post more at that point.