Easy way for debugging handlers?

[kensaggy]

I'm working on a handler which for some reason is not working at all although it is recognized by firesheep. How does one easily attempt at debugging handlers?

The handler is pretty straight forward, single domain, single cookie containing the session id.

Firefox 7.0.1
Mac OS X 10.7.3
Firesheep was compiled locally.
Works on detecting other handlers just fine - so it's clearly my handler.

P.S.
anyone got any known pit-falls with new handlers? maybe i'm missing something very obvious