Mark your install still has the OLD FILE on it
http://www.bamboocraft.net/bamboo/sh...lfields&name=&when=0&whenterm=&condition=and
TELL TAKE GIVE AWAY RIGHT IN THAT URL WHEN I DO A SEARCH ON YOUR INSTALL
Take that when=0 out of the url and you see it work. This was a bug I fixed back in 5.11 on July 12th and indeed line 437 is correct.
I suggest deleting your old files and reupload.