Hey all My Macbook is awesome, absolutely no complaints except for this loud "Ding-dong" noise that comes at really random times. It's sort of fuzzy, like a recording on a cell phone (which I'm sure it's not), and it's just a higher pitched beep then a slightly lower pitched beep. I've searched everywhere and I haven't found any posts or anything at all like this. I can have no applications open, other than background processes (I'll list those below) and it'll make the noise. So I sort of assume it's either some ridiculous Leopard malfunction or that it's one of the Preference Panes I have installed. If anyone has this same problem let me know, I'm going to start recording exactly what's open whenever it makes the noise and try to find something in common between them. Pref Panes: Connect360 Flip4Mac iStat Menus OneKey Perian If anyone wants any more info just post. Thanks for the help.