v9.2 Build 9235 Bug - Rollover tabs

I just upgraded to the latest ServiceDesk Plus build ( 9.2 Build 9235, on Widows Server 2012R2)

When access the console via the latest Google Chrome , Firefox, or IE11 (I'm using Windows 10 1607), the rollover bar at the top of the page is blank (from Home Icon -> User Icon). The rollover shows the individual buttons when I hover, but the 'rolloff' puts it back to blank again.

Is this a known issue? Any fix available?