Times where one would use new style classes vs classic classes

[Quek]

Hi all,

I'm really new to Python and I've been reading up some texts on older
versions of Python (2.2 to be specific).

The text briefly mentioned new style and classic classes.

I'd really like to know in the current context of Python 2.5, besides
in the cases of multi-inheritance, where would I use new style
classes? Is it a norm to use more new style classes even if I don't
have multi-inheritance in the industry, open source projects, etc
today?

If this isn't the right place to ask these questions, could some one
point me somewhere more appropriate?

Thanks a lot.