Update post-uninstall script for the crossplatformui Ubuntu package to make sure it is uninstalled properly without errors. Details are here : http://techbrahmana.blogspot.in/2013/03/package-installation-error-on-ubuntu.html

crossplatformui.postrm

#!/bin/sh
set -e

SETTING_DATA_PATH=".ztemtapp/ZTEEVDO"

#e.g. /var/lib/dpkg/info
# when execs "sudo dpkg -P xxxx", 1st execute this script with "remove" arg, then execute this script with "purge" arg
if [ "$1" = "remove" ] ; then
  sudo sed '/ztemt/d' /etc/init.d/rc.local > tmpfile; sudo mv -f tmpfile /etc/init.d/rc.local; sudo chmod 0755 /etc/init.d/rc.local

#kill ztemtvcdromd
    #sudo killall -9 ztemtvcdromd
    if [ -d  /usr/local/bin/ztemtApp/zteusbserial ] ; then
         sudo /bin/rm -R /usr/local/bin/ztemtApp/zteusbserial
    fi

#purge: Remove USB Driver
     if [ -n "$(lsmod|grep ztemt)" ]; then
        sudo /sbin/rmmod ztemt ;
    fi

    sudo /sbin/ldconfig

#Delete Setting.conf
    /bin/rm -f /root/$SETTING_DATA_PATH/Setting.conf
  /bin/rm -f /root/$SETTING_DATA_PATH/MultiUser.xml
    /bin/rm -f /root/$SETTING_DATA_PATH/EVDOApp.pid

    for ALLUSERPATH in `find /home -mount -maxdepth 1 -mindepth 1 -type d`;
    do
      	if [ -d $ALLUSERPATH ] ; then
	    /bin/rm -f $ALLUSERPATH/$SETTING_DATA_PATH/Setting.conf
 		/bin/rm -f $ALLUSERPATH/$SETTING_DATA_PATH/MultiUser.xml
 	    /bin/rm -f $ALLUSERPATH/$SETTING_DATA_PATH/EVDOApp.pid
      	fi
    done

fi

#if [ "$1" = "purge" ] ; then
#fi
# End automatically added section

exit 0