Hi,
same problem here, also the cursor is lagging on the mainstream while mouseover any button.
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1
Processor: AMD FX(tm)-8350 Eight-Core Processor (8 CPUs), ~4.0GHz
Memory: 16384MB RAM
Card name: AMD Radeon R9 200 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x6798)
DAC type: Internal DAC(400MHz)
Display Memory: 4095 MB
I already updated my drivers but no change occured so far.