GTK+2 crashing at startup

[iain <iain ximian com>]

Upgraded everything last night, and now everything crashes thus:

[iain discomachinegun tests]$ /usr/bin/libtool gdb ./testgtk
(gdb) r
Starting program: /usr/local/gnome2/head/cvs/gtk+/tests/.libs/lt-testgtk
Program received signal SIGSEGV, Segmentation fault.
0x401bc71c in gtk_rc_get_style_by_paths ()
   from /usr/local/gnome2/head/cvs/gtk+/gtk/.libs/libgtk-x11-2.0.so.0
(gdb) bt
#0  0x401bc71c in gtk_rc_get_style_by_paths ()
   from /usr/local/gnome2/head/cvs/gtk+/gtk/.libs/libgtk-x11-2.0.so.0
#1  0x080a1f18 in ?? ()
Cannot access memory at address 0xa

Anyone any ideas?
iain
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