On the same machine (Solaris2.6) running 3 screens on the same X server,
pango with cairo-1.4.12 works on screen 2 (24bit colordepth), but fails
on screen 0 and screen 1 (8bit colordepth), see output below.
This seems kind of a nuisance because gtk/pango depends on cairo nowadays
and thus fails, whereas earlier versions of gtk (which didn't depend
on cairo) worked! Also, this prevents display on old remote machines
with 8bit screens.

% setenv DISPLAY :0.2
% pango-view GLASS.txt
     (--> displays correctly)

% setenv DISPLAY :0.1
% pango-view GLASS.txt
Error: Cairo 1.4.12 does not yet support the requested image format:
	Depth: 8
	Alpha mask: 0x00000000
	Red   mask: 0x00000000
	Green mask: 0x00000000
	Blue  mask: 0x00000000
Please file an enhancement request (quoting the above) at:
http://bugs.freedesktop.org/enter_bug.cgi?product=cairo
Assertion failed: NOT_REACHED, file /_mnt/hd32/package/gtk/cairo-1.4.12/src/cairo-image-surface.c, line 199
Abort