Edit: A negative demark for pointing out this out? Bleh, now that isn't exactly fair. Oh well, I still haven't quite worked out what benefits voting would have.
Anyhow, I've fiddled with the regexes and the response from delirium still doesn't quite fit in with what everything else tells me. Plugging in the two different RegExs in to the script yields completely different results. And given the examples by anon, it would naturally make sense.

Is it fair to stick a link to my site here?

Thanks for you patience.