I'm experiencing brush lag in Photoshop CC (14.2.1) while streaming music in Safari on a late 2013 iMac with 24gb RAM. I thought it was the Wacom driver, so I uninstalled it and then installed the latest version. Nope. I thought it might be Flash Player, so I uninstalled that. I thought it might be Wacom, so I switched to a Huion tablet and changed the drivers. None of that helped. When I stream music, terrible brush lag with even the most basic brushes. When I close the browser window, problem clears up. This computer is new and fast — this makes no sense. OSX is up to date too (Mavericks). Any way to fix this with Photoshop preferences or something?