error_messages_for + no template loaded

Hey all,

I have a model User. A new users can signup at ..../users/new
I have a few lines of validations in my model. And if the registration
attempt fails due to validations reasons, it displays page, but the css
styles are not applied and it shows only the plain html.

Any suggestions?
Thx

Have a look at the source of the page (view page source in firefox) to
check css directives are present and check styles in firebug.

Colin