I once accidentally let a DFH 90 Minute IPA stay in the freezer too long. It tasted great after I let it thaw out.
As long as the cap does not pop or bottle does not shatter and you drink it within 24 hours, it's no big deal. I would not put it back in the fridge and leave it there for weeks, though. There's a good chance that the seal is broken, even if the leak is very slow. Leaving it for next day or later may well result in flat beer. Just wait until there are no ice crystals + 20-30 min before drinking. I've had it happen a few times, but mostly with Sam Adams varieties (no great loss) and bottles of prosecco. I never put expensive beer in the freezer for this very reason. A bottle of cider did explode once (I was not the one who put it there, though).
