libtaz.sh contains a sed call that's incompatible with GNU sed. Maybe is it a problem with shell escaping, but the line is too complicated for me to understand. The simplest patch is to explicitly call busybox.
--- libtaz.sh_old 2015-03-15 21:47:07.591948533 +0100
+++ libtaz.sh_new 2015-03-15 21:57:59.228768221 +0100
@@ -140,7 +140,7 @@
for c in $(seq 1 $cols); do
sep="${sep}="
done
- echo -en "$(echo "$@" | sed -e 's|<b>|\33[1m|g; s|</b>|\33[0m|g; \
+ echo -en "$(echo "$@" | busybox sed -e 's|<b>|\33[1m|g; s|</b>|\33[0m|g; \
s|<c \([0-9]*\)>|\33[1;\1m|g; s|</c>|\33[0;39m|g; s|<n>|\n|g; \
s|<->|'$sep'|g; s|<i \([0-9]*\)>|\33[\1G|g')"
[ "$1" != "-n" ] && echo
