A bad day for XEmacs on AIX... ;) (Yet Another Crash)

Reading netnews in gnus, middle-mouse on an article in the *group* display, and whoomp... /Valdis Fatal error: assertion failed, file glyphs.c, line 590, DOMAIN_LIVE_P (instance) Fatal error (6). Lisp backtrace follows: # (unwind-protect ...) # (unwind-protect ...) # bind (inhibit-quit mime-viewer/ignored-field-regexp default-mime-charset) gnus-article-preview-mime-message() # bind (coding-system-for-write coding-system-for-read buffer-read-only) # (unwind-protect ...) # bind (result group gnus-tmp-internal-hook summary-buffer gnus-article) # (unwind-protect ...) # bind (header all-headers article) gnus-article-prepare(21795 nil) # bind (all-header article) gnus-summary-display-article(21795) # bind (article article-window endp circular lines) gnus-summary-next-page(nil t) # bind (e) gnus-mouse-pick-article(#<buttondown-event button2>) # bind (command-debug-status) call-interactively(gnus-mouse-pick-article) # (condition-case ... . error) # (catch top-level ...) emacs.fatal_error_signal(sig = 6), line 514 in "emacs.c" signal.pthread_kill(??, ??) at 0xd0014c5c signal._p_raise(??) at 0xd001410c raise.raise(??) at 0xd0178d0c abort.abort() at 0xd0172450 emacs.assert_failed(file = "glyphs.c", line = 590, expr = "DOMAIN_LIVE_P (instance)"), line 3115 in "emacs.c" glyphs.check_image_instance_structure(0x20ea9280), line 590 in "glyphs.c" glyphs.unmap_subwindow(0x20ea9280), line 4425 in "glyphs.c" unnamed block glyphs.reset_frame_subwindow_instance_cache.$b2290, line 4193 in "glyphs.c" glyphs.reset_frame_subwindow_instance_cache(0x2061fe00), line 4193 in "glyphs.c" window.Fset_window_configuration(0x2087f000), line 5222 in "window.c" window.save_window_excursion_unwind(0x2087f000), line 5789 in "window.c" eval.unbind_to_hairy(0x19), line 4654 in "eval.c" unnamed block eval.unbind_to.$b1018.$b1019.$b1020, line 4629 in "eval.c" unnamed block eval.unbind_to.$b1018.$b1019, line 4629 in "eval.c" unnamed block eval.unbind_to.$b1018, line 4629 in "eval.c" eval.unbind_to(0x19, 0x2007a804), line 4629 in "eval.c" unnamed block bytecode.execute_rare_opcode.$b440, line 1241 in "bytecode.c" bytecode.execute_rare_opcode(0x2ff20944, 0x206ff322, 0x8b), line 1241 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396.$b397, line 657 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396, line 657 in "bytecode.c" bytecode.execute_optimized_program(0x206ff310, 0x2, 0x20d62690), line 657 in "bytecode.c" unnamed block bytecode.funcall_compiled_function.$b463, line 516 in "bytecode.c" bytecode.funcall_compiled_function(0x20d68adc, 0x0, 0x2ff20d18), line 516 in "bytecode.c" eval.Ffuncall(0x1, 0x2ff20d14), line 3249 in "eval.c" unnamed block bytecode.execute_optimized_program.$b396.$b397, line 747 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396, line 747 in "bytecode.c" bytecode.execute_optimized_program(0x20d9a410, 0x4, 0x20d42010), line 747 in "bytecode.c" unnamed block bytecode.funcall_compiled_function.$b463, line 516 in "bytecode.c" bytecode.funcall_compiled_function(0x20d68464, 0x2, 0x2ff210f8), line 516 in "bytecode.c" eval.Ffuncall(0x3, 0x2ff210f4), line 3249 in "eval.c" unnamed block bytecode.execute_optimized_program.$b396.$b397, line 747 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396, line 747 in "bytecode.c" bytecode.execute_optimized_program(0x200f4f10, 0x4, 0x20af1f90), line 747 in "bytecode.c" unnamed block bytecode.funcall_compiled_function.$b463, line 516 in "bytecode.c" bytecode.funcall_compiled_function(0x20acb50c, 0x1, 0x2ff214d8), line 516 in "bytecode.c" eval.Ffuncall(0x2, 0x2ff214d4), line 3249 in "eval.c" unnamed block bytecode.execute_optimized_program.$b396.$b397, line 747 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396, line 747 in "bytecode.c" bytecode.execute_optimized_program(0x206e7d10, 0x5, 0x20af0c10), line 747 in "bytecode.c" unnamed block bytecode.funcall_compiled_function.$b463, line 516 in "bytecode.c" bytecode.funcall_compiled_function(0x20acb5ec, 0x2, 0x2ff218b8), line 516 in "bytecode.c" eval.Ffuncall(0x3, 0x2ff218b4), line 3249 in "eval.c" unnamed block bytecode.execute_optimized_program.$b396.$b397, line 747 in "bytecode.c" unnamed block bytecode.execute_optimized_program.$b396, line 747 in "bytecode.c" bytecode.execute_optimized_program(0x20f205b0, 0x3, 0x20ae2190), line 747 in "bytecode.c" unnamed block bytecode.funcall_compiled_function.$b463, line 516 in "bytecode.c" bytecode.funcall_compiled_function(0x20ad0e24, 0x1, 0x2ff21c84), line 516 in "bytecode.c" eval.Ffuncall(0x2, 0x2ff21c80), line 3249 in "eval.c" unnamed block callint.Fcall_interactively.$b487, line 946 in "callint.c" callint.Fcall_interactively(0x20ad4a8c, 0x2007a804, 0x2007a804), line 946 in "callint.c" eval.Fcommand_execute(0x20ad4a8c, 0x2007a804, 0x2007a804), line 2652 in "eval.c" unnamed block event-stream.execute_command_event.$b1692, line 3838 in "event-stream.c" event-stream.execute_command_event(0x203d2240, 0x20548de8), line 3838 in "event-stream.c" unnamed block event-stream.Fdispatch_event.$b1747, line 4165 in "event-stream.c" event-stream.Fdispatch_event(0x20548de8), line 4165 in "event-stream.c" cmdloop.Fcommand_loop_1(), line 579 in "cmdloop.c" cmdloop.command_loop_1(0x2007a804), line 494 in "cmdloop.c" eval.condition_case_1(0x2007a864, 0x2002249c, 0x2007a804, 0x200224a8, 0x2007a804), line 1640 in "eval.c" cmdloop.command_loop_3(), line 256 in "cmdloop.c" cmdloop.command_loop_2(0x2007a804), line 267 in "cmdloop.c" eval.internal_catch(0x2008e8c4, 0x20022490, 0x2007a804, 0x0), line 1306 in "eval.c" cmdloop.initial_command_loop(0x2007a804), line 305 in "cmdloop.c" emacs.xemacs_21_2_b33_powerpc_ibm_aix4_3_3_0(argc = -267104288, argv = (nil), envp = 0x00000006, restart = -84215046), line 2147 in "emacs.c" emacs.main(argc = 1, argv = 0x2ff22650, envp = 0x2ff22658), line 2576 in "emacs.c"