As reported at http://lists.freedesktop.org/archives/cairo/2005-June/004318.html

Running cairo-demo/svgspacewar with the 0.5.1 snapshot gives me the error below,
but it's fine with 0.5.0.  Any ideas?  Ubuntu 5.04's X server, with gtk+-2.7.0,
what else do you need to know?


~/devel/cairo-demo/svgspacewar> ./svgspacewar
Gdk-ERROR **: The program 'svgspacewar' received an X Window System
error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 386 error_code 8 request_code 72 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error()
function.)
aborting...
Trace/breakpoint trap