Hmm. Telling xvfb to default to a TrueColor visual did help, in that

[sgt/puzzles] / Buildscr

diff --git a/Buildscr b/Buildscr
index 85fa76e..04e0d87 100644 (file)
--- a/Buildscr
+++ b/Buildscr
@@ -8,7 +8,7 @@ in puzzles do perl mkfiles.pl
 in puzzles do make
 
 # Now build the screenshots and icons.
-in puzzles/icons do xvfb-run -s "-cc TrueColor" make web winicons gtkicons
+in puzzles/icons do xvfb-run -s "-screen 0 1024x768x24" make web winicons gtkicons
 
 # Re-run mkfiles.pl now that it knows the icons are there.
 in puzzles do perl mkfiles.pl