BadLength error when running xrandr

[Joel Feiner]

I have an all-git X setup on my machine, with the correct 
LD_LIBRARY_PATH and all that.  When I run xrandr, even without 
arguments, I always get this error message:

X Error of failed request:  BadLength (poly request too large or 
internal Xlib length error)
   Major opcode of failed request:  147 (RANDR)
   Minor opcode of failed request:  15 ()
   Serial number of failed request:  20
   Current serial number in output stream:  20

I have all the updated protos installed.  X server has been rebuilt many 
times.  I use jhbuild to update my xorg installation and, aside from 
this, I haven't had any problems.

Any ideas?