Okay, my setup is in my signature. I'm using the Apple wired keyboard that came with my cMP. The issue: Sometimes (often actually) when I'm replying to a thread, I'll be typing along at a decent rhythm and suddenly the characters start lagging and freezing on the screen (in the text box) as I type. Sometimes I'm a full line or two ahead of my Mac. Is this a Yosemite bug or perhaps Safari, or what? Anyone else getting this annoying issue? Thanks.