Just tested the S2 with a Sandisk 8 GB Extreme 30 MB/sec and was able to repeat the fault. The only card in the was SDHC card. The S2 was set-up for parallel. The S2 will record the images fun, up until the ISO is changed. After ISO is changed, none of the subsequent images are recorded. If the S2 is turned off & on, the card will record images again – until the ISO is changed again.
I set the S2 for “Sequential” and then the card functioned fine. Next, I’ll re-test the 32 GB card with the S2 set-up for “Sequential”.