Default [Q] SDHC Card

Can anyone tell me as to what is the highest capacity card the S740 supports. Just talked to the HTC hotline, and they tell me it's 8GB (first they alleged it was only 4GB yet I had an 8GB in my machine that just got stolen).

On the other hand, I see offers out there for 16GB and even 32GB that supposedly work with the S740.

thanks in advance for your help