Favorite Channels Missing

I had a bunch of channels listed as favorites and I would use the favorites version of the guide.  Starting this morning, no channels show up in the favorites guide.  Looking at the all channels guide, the channels still show a "*" acting as if they have them listed as a favorite.  If you remove favorite and re-add it to the same channel, it then shows up in the favorites guide.  It was working fine yesterday and I have not had an outage or anything.  Was there a software release or something that messed up favorites?