Quote - > Quote - something like %^$£^ probably wont work.

Well, it happens I had a Poser Pro 2010 running and I tried copy/pasting "%^$£^" as a light name - It works just fine!
Poser doesn't seem to make any sanity checks for input, so if you need a buffer overflow to make root, Poser seems to be your app of choice... :-D

In older versions of poser certain characters couldn`t be used.