Ok, I've been drinking my way through 2 different batches - a PM pale ale, and a ME pale ale.
In general, these are both great beers - the PM is sweet & nutty (probably not correct for a pale ale, but a good beer none the less) the ME is a bit more spot on for the type.
But some of the beers I pop are just off - the other night one of the PM's was flat & had a bad taste (yeasty and maybe DMS?) where one of the ME's definitely had a DMS flavor.
I know I need to boil more to get rid of the DMS - something I've corrected in my latest batches - but what would cause different beers in the same batch to have different flavors? Is this a bottling issue (cap not on right? dirty bottles?) or something else?