Today I went to my brew shed to get some beers out of the fermentation chamber which I also use a beer storage central. When I went into the shed I knew all was not well- smelt like a pub! When I lifted the lid all was not well. Approximately a pint sat in the bottom of the fermentation chamber.
Now the really confusing thing is it's not entirely obvious where it's come from. None of the bottles had evidence of spillage (such as dried beer down the side), the mini-keg tops weren't full of beer (which they would be if the top bung had gone) and there was no obvious leaks from the taps. The only clue was one bottle which was only a quarter empty and I am certain it wasn't when I put it in the chamber (no point really bottling 1/4 a pint of beer!). So I'm thinking that that bottle let out it's beer.
I've had the bottle up against a torch and cannot see any cracks. After my past problems with wild yeasts I did sterilise the bottles in the oven before use so I suppose there could be a non-visable crack. Wierd thing is when I let off the crown cap it was still nicely fizzy!
So I'm thinking- do crown caps ever seal badly? A slight leak on the crown cap could have let out the 2ndry fermenting beer and then gummed up leading to a build up of pressure. Just in case I'm going to dump that bottle- if it does have a crack it could give way big time at some point. The contents tasted quite nice

Anyway, damned if I know. I was expecting a load of broken glass and bottle bottom action when I opened up the chamber....
Could it be that that bottle had a particularly high level of sugar which caused an issue or does syphoning the beer onto the priming sugar suffice in terms of mixing everything up?
Very strange! Good thing I don't keep any grains in the chamber- the beer had acquired a nice grey mould on it- whatever spilled must have done so a few days back. If I had grains in there I'd be dumping them!