1) What about different scroll bar colors on Lucid?  If that matters, this is Xaw3d-1.6.2.

2) Did you ever run 'make check'?  I tried and got 55 core files with the same crash backtrace:

#0  0x000000379220f62b in raise (sig=11) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:37
#1  0x00000000005738ba in terminate_due_to_signal (sig=11, backtrace_limit=40) at ../../trunk/src/emacs.c:387
#2  0x000000000059da36 in handle_fatal_signal (sig=11) at ../../trunk/src/sysdep.c:1697
#3  0x000000000059da0b in deliver_thread_signal (sig=11, handler=0x59da1c <handle_fatal_signal>) at ../../trunk/src/sysdep.c:1671
#4  0x000000000059da6c in deliver_fatal_thread_signal (sig=11) at ../../trunk/src/sysdep.c:1709
#5  <signal handler called>
#6  0x0000000000428979 in adjust_frame_size (f=0xb9deb8, new_width=-1, new_height=-1, inhibit=1, pretend=false)
     at ../../trunk/src/frame.c:490
#7  0x00000000004c24ae in Fset_window_configuration (configuration=...) at ../../trunk/src/window.c:6371
#8  0x000000000061d8f3 in Ffuncall (nargs=2, args=0x7fff084ea648) at ../../trunk/src/eval.c:2808
#9  0x0000000000667e33 in exec_byte_code (bytestr=..., vector=..., maxdepth=..., args_template=..., nargs=0, args=0x7fff084eae78)
     at ../../trunk/src/bytecode.c:918

(Note -1 new_width and new_height at #6).

Dmitry