If I exit the X server via alt-control-backspace, the xterm
provided with RedHat 6.0 does not seem to terminate. If I
run the 5.2 xterm binary from your XFree-18.104.22.168 it does
terminate when the X server goes away (as well as every
version of xterm I have ever used in the last 11-12 years).
This is a major annoyance. I have temporarily worked around
the problem by using the 5.2 version.
You need to install utempter-0.5-2 to fix this problem.
An errata is due soon.
*** This bug has been marked as a duplicate of 2767 ***