The only issues I have with it relate to the default skin declaring everything in PX -- absurdly undersized PX at that; but that's my complaint about 99.99% of phpBB installs anyhow... well, that and it's phpBB. Even the littlle "enlarge/shrink" fonts thing in the corner doesn't bump it anywhere NEAR enough. Whoever thought 10px fonts was a good idea could use a beating.
But I'm using a opera user.css to override everything to 100% anyways so that's a non-issue. Kind of sad though how allegedly 'professional grade' software like phpBB still seems to be developed by people who say "WGAG? What's that?!?"
The only thing about Adobe web development products that can be considered professional grade tools are the people promoting their use.