Dear all, We managed to fix the problem that prevented the release of a Mac binary for LyX 1.6.4. A binary for the Mac is now available at ftp://ftp.lyx.org/pub/lyx/bin/1.6.4/LyX-1.6.4.1-Mac-Universal.dmg
Note that this is an extra release (hence the *.1 version suffix). However, the only difference to 1.6.4 proper is the Mac bugfix (that did not affect other platforms). Thus, we do not intend to build new binaries for other platforms. The source of LyX 1.6.4.1 is also available (for reference). A proper announcement for this "service upgrade" release will follow later this week. Have fun, Jürgen (in behalf of the LyX team)