I only have the regular Memory sticks, no pro ones here.
Believe it or not, this morning before I left the house to go ship the camera off I decided to check it out one last time and it worked. It gave me a "format error", probablly because I formatted the cards in my PC trying to figure out what was wrong. The camera would still not see the cards last night, but this morning it worked just fine. I formatted the cards in camera made several test shots, formatted again, more shots, formatted and it still works.
My wife loves the Sony 707 and does not want a new camera so I was all ready to ship it off for repair. We will see how long it holds up this time. But i know it will have to go in for repair one of these days
James