Argh. Why is this happening to me?

OK.. I originally thought this was some sort of AIX screwage. It's been there since at least 21.2-b19 (I have a stack traceback from Oct 29, 1999), but I've been seeing it under latest-CVS updated this morning to -b46 plus. This on a RedHat 7.0 system. Symptom: Using gnuclient, when you hit control-X # to close a client, XEmacs folds up. Seems to be intermittent - today it's every 1-3 attempts, but sometimes it won't bite for several days. Given that I'm seeing it a lot, but it doesn't *seem* to be a show-stopper for others, I'm obviously using some variant config that tickles the bug. I've appended the Installation and tracebacks - anybody got any ideas? /Valdis