here it is from gopro…
You can use a 4GB SD card on our new 5MP cameras, but you cannot save a file larger than 2GB or it will corrupt the file. This will change in two weeks when we release an update patch for all of our 5MP cameras that will allow you to use a 4GB SD card and save 4GB files. That’s 1 hour and 54 minutes of record time.
And our new 5MP cameras will last for 3 hours and 15 minutes of recording (straight or split up) when using Energizer Lithium AAA batteries. We’re still testing run times with NiMH rechargeables but it is looking to be the same.
We’re working on a second patch that will allow for 8GB SD cards and 4 hours of recording but the time will be limited by the batteries…3 hours and 15 minutes.
… the guy who posted this on the surf sire also reckoned that the patch improved the auto exposure.