So, I've had Minecraft for a few months now, and I just got this bug a couple weeks ago. My laptop is on Linux Fedora 18, FYI. The problem is that the regular click (click once and the item follows your mouse) doesn't work, plus, the shift-click doesn't work either ( to get a whole stack right away). Instead, I have to drag one by one, every time. It's annoying. Please help. I tried reinstalling Minecraft, but that didn't work.