What happened to the beer?

Hundreds of my readers (ok one then) have asked what happened to the all grain beer. I am so excited that at least one person reads the blog in enough detail to remember that the story hadn't been finished, that I have decided to tell you about it even though it is a disappointment we are trying to forget.
We don't know exactly what went wrong. We have had beers that were brilliant and ones that have been less good, some have taken a while to become really nice, occasionally from a ropey start, but we have never had an undrinkable one... until now...
It has two things wrong with it. It is slightly vinegary and also has a nasty sulphery 'fart' smell and taste. We did feed some of it to the pigs so that we could feel we had got some benefit from it. The rest is still sitting around and we taste it occasionally to see if it has made any improvements. Perhaps it is less horrible than when we first tasted it but not much.
We will embark nervously on our 2nd all grain brew soon, but at the moment we have been making a few brews from kits and extract/hops/malt to get some drinkable stuff in stock. We are also making a brew for someone birthday party, so really hoping that one will work out well.