Allow code in glade callbacks?

do any of you glade experts/users have an opinion on this?

http://sourceforge.net/tracker/ 
index.php?func=detail&aid=922354&group_id=64773&atid=508620
i know some people have in the past expressed the opinion that keeping  
code out of the xml ui description is A Good Thing, but it would be  
pretty convenient.
--
He's so good, you're gonna rock, and if you don't rock, it's your own  
fault.
  -- kk, describing the perks of having a very good drummer.