hard to say something using the description. make screenshot or describe what "not correctly" means.
B.t.w. my assumption that the look and feel could be broken by some application css. check with firebug.
It's like the components lose the css styles
or classes from your stylesheets redefines RF internal ones? :)
Still not enough info.
I don't think so because I begun to go wrong without having modify any code.
Here's an example:
As you can see the rich:tabPanel show correctly but the rich:panel don't
Before we could check it live or you will check it with firebug we could suggest almost nothing. :(