Yepp, mine are gone, too.  

"Oh havent played it since May, let me just login into ug and look up some fancy chords before going to drink with friends." So much for my luck
All of mine are gone too. It's systemwide. 

I contacted SErgey the developer, he should be on it.

My iPhone app has kept the info though, so at least that's accessible for anyone who needs the info now.

Cheers, Kairos.
me too. where did my favorites go? gone. but still appear on my iphone app. what's going on?