The forum has a new default theme - and one that looks a bit differently depending on the resolution you're using on your monitor. For example, here's the display in Firefox at 800X600:
At 1024X768:
At 1440X900:
And at 1680X1050:
The theme looks best on widescreen 16X9 monitors, but will also work fine on a standard 4X3 monitor. Though for those of you who hate change, the Arcane Magic Theme is still available.
However, because the forum may be upgrading to SMF 2 before too long, that particular theme will no longer be upgraded should new features be added to the forum before the upgrade, and it will in all probability be discontinued altogether after the upgrade to SMF 2.