Question regarding openGL screensavers (with xorg ati driver)

[Andy Burns]

Running current rawhide, with xorg drivers for my ATI card, I have 
xscreensaver  + extras + glextras installed, regardless of whether I use 
xorg vesa drivers, xorg ati drivers or xorg ati drivers with EXA 
extensions I can't get any of the openGL screensavers to start they all 
give messages similar to ...

X error in glplanet:
X Error of failed request:  BadAlloc (insufficient resources for operation)
   Major opcode of failed request:  143 (GLX)
   Minor opcode of failed request:  3 (X_GLXCreateContext)
   Serial number of failed request:  111
   Current serial number in output stream:  112

I was beginning to think this might only be expected to work with the 
ATI proprietary drivers, however yesterday I was tunneling X over SSH to 
my laptop running cygwin/X and I noticed that the openGL screensavers 
all worked that way (and with quite an impressive speed considering the 
tunnel was over WiFi)

Is it expecting too much of the current xorg drivers to support GLX (I 
thought MESA should at least step in as a software renderer as last 
resort) or should I bugzilla this?