timezone issue

Hi,

while installing Smolder I got a DateTime related error.
Michael Peters narrowed it down to the following call:

perl -MDateTime -le 'print DateTime->now(time_zone => q(local));'

which dies with the error:

Cannot determine local time zone

DateTime version was 0.4501.
After upgrading to 0.47 (all tests passed) the error remained.

Ubuntu 8.10 (perl 5.10)

Is this a problem in my system?

A test that could be added to DateTime to catch the issue ?

Do you need any other information ?

regards
  Gabor