[quote="BearOso"I'm pretty sure I've got the wrong byte order for the 15-24 bit RGB Xv modes, but have no way to test them.

If anyone with Intel graphics sees problems, let me know.[/quote]
I just compiled v25 on a Macbook (Intel 945GM graphics) running Gutsy Gibbon, and the colors show up just fine in Xv mode. And unlike OpenGL mode, it doesn't hide the menus with Compiz running. Yay!
I have found a problem, though: when you turn on the NTSC scaling mode, the display gets vertically compressed, leaving solid blue bars at the top and bottom of the window. If you resize the window, sometimes these bars are repainted in blue, sometimes in black, and sometimes they're not repainted at all and you get the widget colour, or fragments of status-bar.
Also: I tried changing my button settings in the "SNES Joypads" tab, and although I can change a button by tabbing to it and pressing "Enter", the instructions at the bottom say "Click a button..." and this doesn't work - instead of staying depressed and listening for a key (as it does when I hit Enter), the on-screen button only stays depressed while I'm actually holding the mouse button down.