I've just finished building and uploading 1.4.2-apple9. Install 2.3.1_beta2, then drop in this binary update. See http://xquartz.macosforge.org/trac/wiki/Releases#xorg-server for details. Here's the link: http://static.macosforge.org/xquartz/downloads/X11-1.4.2-apple9.bz2 This release addresses the following over 2.3.1_beta2: - Capslock "press ignored" bug is fixed. - modifier keys used to emulate button2/3 are not sent with the click/release - the list of modifiers allowed in the fake_button{2,3} defaults has been expanded: fn,{l,r,}{command,alt,shift,control} So if you want to be able to emulate command-button3 you can change fake_button3 to be fn and hold fn+command+button1. Or you can set it to lcommand and hold lcommand+rcommand+button1 ... hopefully this added flexibility will solve everyone's needs. Please try it out if you've been having modifier key or 3button emulation issues. Thanks, Jeremy