Hello, I just installed the windows version of LyX 1.3, more precisely the version of Ruurd Reitsma, (that needs no Cygwin and no X-Server).
I have preview package version 0.7.8 (which is the lastest) on my MiKTeX system. On LyX I did Edit->Reconfigure. Then I restarted LyX, but I see no effect on math formulas. Is there a special trick to do? best regards Marcus http://www.Stormlight.de