Well Giz every time I have mentioned that setting. Everyone beats me up.(Including you) LOL.
So I don't suggest it anymore.
Well, I reccommend against using it, and recommend ONLY using the MySQL logging option, but if you don't have a forum setup to use a mysql server you can't really error test...
But I highly recommend that you disable the option once you're done playing with it; you don't need your users seeing error messages that could potentially contain sensitive information about your server(s)