if i have say more than 2 tabs open in Safari, and one sits in the background while i browse around in the others... then, returning to the neglected third tab may necessitate a refresh (page sometimes needs to be loaded again).
With regard to that anemic caching behavior mentioned there: i have been seeing comments in various forums where iOS 4.2 beta testers opine that it's probably not a RAM issue after all. Some of those testers claim that iOS 4.2 (and the Safari which comes along for the ride) are performing admirably... and that the need to frequently reload when browsing with multiple open tabs (i believe 9 is the max on iPad) is gone.
If true, that is great news.
--
Meanwhile, CNBC continues its iPad adulation:
iPad Adoption Rate Fastest Ever, Passing DVD Player
