Time.advance( :minutes=> x ) question

Hello all-I'm a new Ruby developer(but longtime java developer), and
I'm having trouble getting Time to work for me.

With a 'base' date as Monday of this week:
Time.now.beginning_of_week.asctime
=> "Mon Dec 10 00:00:00 2007"

I can advance days without problems

Time.now.beginning_of_week.advance({ :days=> 15 } )

=> Tue Dec 25 00:00:00 -0600 2007

but if I try to advance minutes, my code fails silently:

Time.now.beginning_of_week.advance({ :minutes=> 15 } ).asctime

Time.now.beginning_of_week.advance({ :minutes=> 15 } ).asctime
=> "Mon Dec 10 00:00:00 2007"

Any ideas on what I'm doing wrong? I'm on Rails 1.2.6

Good Question it seems to work for me in Rails 2.0.1:

Time.now.beginning_of_week.advance({ :minutes => 15 }).asctime

=> "Mon Dec 10 00:15:00 2007"