As I remarked elsewhere, the Market app is now suddenly fully functional on my Scroll. My theory for this; I have bought a Galaxy Tab [don't worry, am keeping the Scroll for experiments ] and on the Tab, Market of course works and I have signed in using the same gmail account as on the Scroll.
Is it possible that when I use the Scroll, Market thinks it's the Tab as my account and (static) IP address are the same? If so, that's a solution to the problem