Tabs look and feel are different for different Operators !
After upgrade from PRPC 5.5 to PRPC 6.3 sp1, the look and feel for the tabs is not the same. The tabs in one operator are showing the focussed tab color as white while in others it is showing the same color for all the tabs.
Steps to Reproduce
Upgrade from PRPC 5.5 to 6.3 sp1 caused some issues and the Desktop Preferences was not referring to any skin rule.
From operator dropDown, click on Preferences . The Desktop Preferences window gets opened. The Skin should refer to OOTB EndUser62. Setting the right skin resolved the reported issue.