Ink Cartridges with Built-In Self-Destruct Dates

Linker3000 writes "The Inquirer has an article about HP ink cartridges having a built-in expiry date that can cause them to become unusable even if they aren't empty! Another twist on the 'chipped cartridge' stories--and also another kick in the teeth (and wallet) for the consumer methinks." This isn't really a new problem - here's a good piece about the problem.