Secure Digital (SD) cards 4GB in size

I took a chance, and ordered a 4GB secure digital card for $99. It won’t work in either my Canon EOS 1Ds Mark II or my Panasonic Lumix FX01. I tried in-camera formatting as well as formatting by the computer.

Apparently Canon is working on a firmware update that will address this issue, though whether my card will benefit is unclear.