> Both versions of Mac OS uses XQuartz as system default (i.e. installed by OS). Use the aftermarket Xquartz on both: http://xquartz.macosforge.org/trac/wiki The X server in Lion may have the same version number, but there are some fixes in the download package that didn't make it into the OS-supplied package. These will install into /opt/X11 on both 10.6 & 10.7. There's also an RC of a new Xquartz that will probably be released in the next few weeks. I've heard of a number of issues on Lion though, and my Macs are on 10.6 so YMMV.-r
