rxvt-unicode yellow box be gone

Wilmer has the fix for rxvt-unicode popping a little yellow box full of ticky-tacky when I hit CTRL-SHIFT. Tweaked instructions, with my preferred package:

apt-get source rxvt-unicode
sudo apt-get build-dep rxvt-unicode
cd rxvt-unicode-*
perl -pi -e 's/--enable-iso14755/--disable-iso14755/g' debian/rules
dch -n 'disable iso14755'
fakeroot debian/rules binary
sudo dpkg -i ../rxvt-unicode_*.deb