crash while scrolling

anyone seen this before? error_check_window(long 108) line 264 + 17 bytes real_window_internal(long 108, window_mirror * 0x0000006e, window_mirror * 0x01f91d80) line 406 + 9 bytes real_window(window_mirror * 0x01f91d80, int 1) line 489 + 30 bytes mswindows_handle_scrollbar_event(HWND__ * 0x00370132, int 0, int 0) line 184 + 14 bytes mswindows_wnd_proc(HWND__ * 0x00170112, unsigned int 277, unsigned int 0, long 3604786) line 2727 + 26 bytes USER32! 77e148dc() USER32! 77e14aa7() USER32! 77e266fd() mswindows_need_event(int 1) line 1500 emacs_mswindows_next_event(Lisp_Event * 0x020c4f10) line 3277 + 7 bytes event_stream_next_event(Lisp_Event * 0x020c4f10) line 498 + 13 bytes next_event_internal(long 34361104, int 0) line 1958 + 9 bytes Fsit_for(long 3, long 28368900) line 2820 + 11 bytes maybe_echo_keys(command_builder * 0x01e33a00, int 0) line 683 + 19 bytes lookup_command_event(command_builder * 0x01e33a00, long 34594864, int 1) line 3725 + 11 bytes Fdispatch_event(long 32505088) line 3988 + 15 bytes Fcommand_loop_1() line 583 + 9 bytes command_loop_1(long 28368900) line 495 condition_case_1(long 28368996, long (long)* 0x010505d6 command_loop_1(long), long 28368900, long (long, long)* 0x0104fff0 cmd_error(long, long), long 28368900) line 1651 + 7 bytes command_loop_3() line 256 + 35 bytes command_loop_2(long 28368900) line 269 internal_catch(long 28448988, long (long)* 0x01050140 command_loop_2(long), long 28368900, int * volatile 0x00000000) line 1317 + 7 bytes initial_command_loop(long 28368900) line 305 + 25 bytes STACK_TRACE_EYE_CATCHER(int 1, char * * 0x01b46fd8, char * * 0x01b50300, int 0) line 2257 main(int 1, char * * 0x01b46fd8, char * * 0x01b50300) line 2690 XEMACS! mainCRTStartup + 180 bytes _start() line 169 KERNEL32! 77e992a6() -- ben I'm sometimes slow in getting around to reading my mail, so if you want to reach me faster, call 520-661-6661. See http://www.666.com/ben/chronic-pain/ for the hell I've been through.