若再依這網站說的
http://btclush.com/pc/linux/comments/2z1j65

/new_beta_amd_catalyst_153_fglrx_1520_fixed_a/
New beta AMD Catalyst 15.3 (fglrx 15.20) fixed a Ubuntu Unity bug with maximized Chromium-based browser!

Hi. Today I check new beta AMD driver and I have one nice news, AMD fglrx drivers 15.20, bringing a cool fix.

一連不就說
beta AMD Catalyst 15.3 就是AMD drivers 15.20,
而amd最新的AMD Catalyst™ 15.6 Beta Driver比它還新？