I've built fresh copies of xfce4 on a macbook and MDD G4, and I get the same behavior: I can get XFCE to come up under Apple's X11 (startxfce4 in ~/.xinitrc), but there seems to be something messed up with button clicks/mapping -- I can't get XFCE to respect any button clicks, either in the panel, or on the desktop. If I turn off "Emulate three button mouse" in X11 | Preferences..., then I need to use the option key to get the WM to listen to left clicks. With the option key down, the WM will also honor right clicks on the mouse (logitech and Dell 3 button mice tested). I need to use the command key to get the WM to honor window closes (left click on X button). It's also a bit strange that if I use key combinations a number of times on the same widget (e.g., settings icon in panel), I no longer need to use the option key. The WM/server appears to "learn". Some dialogs in Xfce require no modifiers. Strange. As I said, I can reproduce on an intel and ppc box. Anyone else see this? Or know anything about mouse button mappings in X11? (Trying to reproduce in Gnome, but I'm currently hung up on iconv issue -- see previous post). Thanks, Fred