Yea that's what the tech said when we determined the problem. I've never dealt with splitters going bad so I was surprised when he said that was the problem. Thankfully he replaced all the old ones we could find while he was here so this most likely won't happen again for while.
Just remember where all those splitters are if you ever get whole house DVR. I got it with a promo.. my internet bill went up $7 more a month but I got WHDVR, HBO and extreme internet.. but when the guy came over he needed to install these 2 inch long adapters onto every single splitter.