What's wrong with my REXML

Hi everyone,

After I upgraded Rails recently, something suddenly broke with REXML.
All my feeds views are broken.

xml.instruct! for example and all xml.* methods are undefined all of a

NameError in Signup#start

Showing app/views/signup/start.rhtml where line #9 raised:

undefined local variable or method `xml’ for

Anyone has an idea what may be wrong ?