Canon has today released new firmware for the G1, G2 and Pro90IS. For the G2 it is labelled version 1.0.1.0 and for the G1 / Pro90IS it is labeled version 1.0.0.3. These firmware updates both address the same issue: "With Firmware Version nnn, BP-511 or BP-512 Battery Packs that had become over-discharged were sometimes not chargeable in the camera. With Version nnn, such Battery Packs can be charged in the camera."

Click here to download Canon PowerShot G2 Firmware 1.0.1.0

Click here to download Canon PowerShot G1 Firmware 1.0.0.3

Click here to download Canon PowerShot Pro90IS Firmware 1.0.0.3