RVSkin just has released a new version to fix a problem in cPanel/WHM 54. The problem on cPanel Interface blank in RVSkin themes for cPanel/WHM 54. http://www.rvskin.com/change_log
Please update RVSkin in your server of the solution.
Other issues for RVSkin in cPanel/WHM 54 will be fixed soon. Please stay in touch with us.