Check this
any news on that? cause I have the same problem and when I tried this I had to flash a new rom as my phone had a bootloop :s
Well... I had that problem twice when i was trying to unlock that system stuff... The thing is being carefull with the characters in the Terminal, since a space changes the whole command... Try
su
mount <space> -o <space> rw,remount <space> /system
cd <space> /system
chmod <space> -R <space> -i <space> *
On the other side, chmod does NOT always get the -R commands, if still getting Bad Mode try
su
mount -o rw,remount /system
cd system
lsattr
chattr -R -i *
rm –f /system/set_immutable.list
Changing the Chmod for Chattr worked for me, btw lsattr starts with an L not an I, and again be carefull with spaces, if with this does not work you might wanna try an exorsism since this is the last way... Hoe it works for you to man!!