Gamers that got into Microsoft’s Xbox Live preview program (for Facebook, Twitter, and Zune) are being warned not to use unauthorized storage devices (memory cards). Doing so could be bad (it’s a technical term). Microsoft’s Major Nelson warned:
When Preview Program members start receiving the Xbox 360 system update next week, one of the changes is that unauthorized Memory Units will no longer work with the Xbox 360. If you’ve moved your profile or saved games onto one to “back it up,” you’d better move it back onto an authorized Xbox 360 storage device prior to taking the update. If you continue to use an unauthorized Memory Unit after the update, you will not be able to access your stored profile or saved games.
So check yourself before you wreck yourself preview program peeps!