Wasn't really sure where to post this question, since it doesn't pertain to a "home brew", but is just a general question about beer in general.
After I purchased my keezer, while I was waiting for two homebrews to finish fermenting I purchased a 1/6 keg of ShockTop *dodges thrown bottles* because I was anxious to use my new setup. Everything was fine for a while, or at least as fine as it can be with a cheap mass produced beer.
Due to error on my part, a significant amount of beer leaked out into the fridge, and led me to discover that I had also set the temperature too low because it froze to the bottom. I placed the keg outdoors overnight to thaw out (temperature was in the low 40's outside) while I cleaned the fridge. The next day I placed it back in the fridge in the afternoon. The high for the day was in the mid to high 50's, so thats the highest temp the beer could have reached.
It's been about two weeks now, and when I pour a glass the beer
(a) appears more cloudy than it used to be
(b) has little off-white particles floating around
(c) tastes funky, like something I've never tasted before. A nasty buttery flavor is the best I can describe it
What happened? Did the rise in temperatures cause a secondary fermentation to begin? Did freezing the beer some how mess it up? Is it at all salvageable?
Thanks for indulging my curiosity!