aws-s3 and 10.5.2

I'm running the default ruby installation that comes with Leopard and
I updated to 10.5.2 on Friday. With this update came an error with
aws-s3

As autotest is running through my project (Which is using
attachment_fu which is of course dependent on aws-s3) I get the
following error:

NoMethodError: undefined method `httpdate' for Sun Feb 17 14:51:09
-0600 2008:Time

its almost as if 'time' isn't being loaded, or that somehow in the
apple framework these methods are closed/blocked/not used?

For information I'm running this verison of ruby:
ruby 1.8.6 (2007-09-24 patchlevel 111) [universal-darwin9.0]

running rails 2.0.2
and running aws-s3 0.4.0

I would love to find any people having the same issue, and if someone
has fixed it already, what they've done... look forward to finding
company in this misery.

Matt