Since prices have come down in the last 2 years on CF cards, I was just wondering if there is a limit on the GB that we can use. There at one time a limit on the EX1 with the size of card without a software update to the camera. The largest I have are 32GB.

The manual does not specify a limit. It says 133x2 GB or more. It might be worth it to try out a 64 GB card.