XQuartz 2.7.3 rc2 is available for download. The main change in this over rc1 is that it contains a fix for the switching spaces bug on Mountain Lion. If there aren't any major issues, this will probably be released as 2.7.3 in about a week, so please give it some testing. Thanks, Jeremy http://static.macosforge.org/xquartz/downloads/SL/XQuartz-2.7.3_rc2.dmg