customize the comment template for cleaned_data errors

[Stephan]

I use Django 1.4.3 and have a problem with the comment-app. If the comment-app miss some data (e.g. the field "Comment" is empty) I get the preview template with the error message. This preview-template is without css-style and looks horrible. How is it possible to use the normal template also for error messages?  I don't need the preview for comments.

Regards
Stephan