Hi, I've made some updates and the position of the top bar can now be changed - see http://use.perl.org/~jj/journal/39365 - this should resolve your issue with CPU usage.
Do count me as one that liked the old design better though: while I appreciate some of the new navigation options (direct links to Perl version docs and module docs are nice), the overall color scheme, and the fixed width, are steps far backward in my opinion. You've gone from a welcoming and cheery site, to an forbidding institutional one.