RE: Fonts, I don't like this idea... The admin should only allow "common" fonts, which are likely to be on every system, vs allowing users to use fonts which chances are no one has installed... for example, I have about 200 fonts, now maybe 5 of those are the stock windows fonts... And only a couple of those are generally "common" on other systems...
Well, if the font is not on the user's system, it could display the forum's default font instead (usually Trebuchet MS). I think there was once a mod for UBB.classic that allowed this.
