Hi folks:
My apologies to those who will find this irrelevant, but hopefully
they didn't read beyond the subject line. I've gotten many questions
about this, so ...
After the update to 10.5.5, you have to update (again) X11, preferably
to 2.3.1.
Why Apple didn't include this in the 10.5.5 is anyone's guess, but
there is an official update available here:
http://xquartz.macosforge.org/trac/wiki
This is the real thing, made by the real Apple X11 developer.
I installed it and everything is working as well as ever.
Except stereo in X11, but we can keep hoping...
Bill Scott