I've gotten this message twice already in only a week of owning the 4150 "SD Initial Fail!!!". All of the buttons become unresponsive - and a soft reset does nothing - it requires a hard reset to clear the message on the screen. I'm using a Sandisk 64MB MMC card - hopefully it's a problem with the card and not the 4150. There have been reports on this board about people having problems with Sandisk. I'm thinking about getting a Lexar 256MB SD card and see if that helps the situation. I've copied all of my programs CAB files to the SD card because I can't trust the thing to keep running without a cold reset. Has anyone else had this problem?