Hmm, Keith and I think it's the gherkin. But we're also afraid we might look stupid and it's actually something even more obvious that we've overlooked!

not stupid at all - it's the correct answer !

(and even if you got it gloriously wrong it wouldn't have mattered - wrong is alright !)

Hey, I think Pootlecat cheated and looked at your "gherkin" tag, which of course is what I did, too, so therefore I'm also admitting I cheated.

that's right BW. i added the tag after pootlecat guessed it correctly though.