Odd behavior/core dump

[Kevin Handy <kth srv net>]

I've played around a bit with gtk+ (using a VaxStation as an
X-Terminal) and have discovered that any program left idle for
about a half hour will core-dump. This is on an Intel Redhat 5.2
system.

The message displayed is

	Gdk-ERROR **: an x io error occurred
	aborting...
	Aborted (core dumped)

And looking at a backtrace in gdb (glade is just the last
program I've let sit idle for long enough to crash, it does
it to all programs, including testgtk and programs that I've
written myself) looks like this

Core was generated by `glade'.
Program terminated with signal 6, Aborted.
find_solib: Can't read pathname for load map: Input/output error

#0  0x4039d6a1 in ?? () from /lib/libc.so.6
(gdb) bt
#0  0x4039d6a1 in ?? () from /lib/libc.so.6
#1  0x4039e6df in ?? () from /lib/libc.so.6
#2  0x401839fb in ?? () from /usr/lib/libglib-1.2.so.0
#3  0x40183ab2 in ?? () from /usr/lib/libglib-1.2.so.0
#4  0x40145881 in ?? () from /usr/lib/libgdk-1.2.so.0
#5  0x401d5925 in ?? () from /usr/X11R6/lib/libX11.so.6
#6  0x401d36d5 in ?? () from /usr/X11R6/lib/libX11.so.6
#7  0x401d30ce in ?? () from /usr/X11R6/lib/libX11.so.6
#8  0x401c8674 in ?? () from /usr/X11R6/lib/libX11.so.6
#9  0x40152878 in ?? () from /usr/lib/libgdk-1.2.so.0
#10 0x4018193b in ?? () from /usr/lib/libglib-1.2.so.0
#11 0x40181be5 in ?? () from /usr/lib/libglib-1.2.so.0
#12 0x400a3afb in ?? () from /usr/lib/libgtk-1.2.so.0
#13 0x807947d in main (argc=1, argv=0xbffffdcc) at main.c:95
(gdb)


I'd like to give you actual function names, but have not yet
figured out how to compile everything to get the symbols
to be displayed by gdb as anything other than ??.

Is there something set up on a timer somewhere
for a half hour (guessing the time) that could be
causing this behavior?