Since Leopard, occasionally, it will just forget things. For example, every so often, some, but not all, of my cookies are reset and I'll have to log back into MacRumors, Facebook, YouTube, etc. I used all three sites and was logged in earlier, but when I came back to turn my computer on again tonight, they all forgot me. Also, sometimes it won't switch windows properly. I'll click a QuickTime window behind Safari, for example, and the menu bar will say that the active app is QT but the two aforementioned QT and Safari windows are both active. None of these problems have occurred until Leopard, and they aren't major, but they are odd. Has anyone else experienced this?