customizing/fine tuning themes in jQuery UI

customizing/fine tuning themes in jQuery UI


I've just started playing with the updated jQuery & jQuery UI, as well
as a very basic theme from themeroller.
I'm currently working on something that uses UI Tabs --I've been using
the pre-UI versions of tabs for a while now-- and there are a few
things to get used. For example, I've noticed that jQuery UI throws a
class="ui-corners-all" on my ul.ui-tabs-nav. It's part of the theme,
but I don't want it on my tabs.
Is there a way to specify that jQuery UI not attach "ui-corners-all"
to my tabs? Or can I "opt out" of theming on just the tabs module? Or
is this a case where I just have to write some css rules to override
the Themeroller styles for tabs?