I'd heard about this case[/url:5tr51gs7] but never knew the details until this afternoon, when I happened across the judgment while doing something else.
Rookie mistake no. 1: Going, as a microbrewer, to Guinness and asking them if they'd like to distribute your beer for you.
Reading between the lines, the business seems to have had many more problems than the legal issue at hand, so I don't think it was just this that scuppered them.
Oh, and look out for the vintners hanging the microbrewer out to dry in paragraph 22. Today's Guinness delivery: forty kegs and thirty pieces of silver.