Does anyone know if the SxS slots must contain matched memory in operation?

For example, can it hold a mixed set of 1-16Gb and 1-32GB SxS cards? or must they match in size?

Or, more specific to my question, can it hold one SxS card (32GB) and one Memory Stick Adapter with <any amount> of memory?

You can mix any combination of SxS, PHU-xx drive or SD, in my experience with an EX3 and current EX1 cameras with current FirmWare.

Only SxS cards work well with over cranking. And I would not over crank while cards are switching (spanning file over 2 cards when the first one fills up) if they are not both SxS cards.

I am sure EX1R are the same and they can use the Sony SxS-1, less expensive SxS cards. And the Sony memory sticks with adapter as well.

thank you for the info.... My EX1-R arrived today..

The memory adapter (B&H) says possibly december, so will have that soon. Mean time going to learn the ropes on the 16Gb installed....