Hi. The title says everything - but just a little more info: I left my macbook for around 30 hours, with the lid closed (the computer in stand by). When i liftet the lid again, it told me it had been shut down because of a problem. Im just curious what caused this - and im not able to reproduce it, because I use my mac everyday (actually the first time it has been left alone this long). The error report is attached. Thanks.