Bug#256931: xterm not liking -sb -si while running in vncserver
OK, go ahead and close this one. Something was really fucked up on that
system. The difference in ltrace output for the working vs non-working
setup made no sense so for sanity I did a cmp on the xterm binaries and
they were different! The xterm binary on the broken system was somehow
corrupted. I tried --reinstall and it was still was different from the
one on the working system. Then I rebooted, did --reinstall again and
now they are the same and it works.