Cheers, Thanks for the quick responses!
I'll definitely tell him to chill for 24 hours, sounds like when he puts it in the freezer this is a quick fix for that.
I'm skeptical to it being a priming sugar problem though because mine are from the same batch, selected more or less at random, but...
Any ideas on what would cause a bottle to gush that is not bacteria? The short background to this question is that I brew with a mate, we split the brew 2/3 - 1/3.
In my 2/3's I've never had a single gusher, but in my friends bottles he usually ends up with about a quarter of them gushing to...