Thank you! yes that explains where i went wrong, I had stable 2.3 installed and I downloaded and attempted to install nightly build without using the EOScard but by the firmware way instead, which apparently fried my memory card. could have been worse I guess. Thanks for the info! If I may ask, are there really any major changes with the nightly builds where the 600D is concerned? I know there are a lot newer better cams out there so I dont know how worried about including the 600D they would be, If not I may just stick with the good ol' 2.3 that ive been completely happy with so far.