I figure maybe that it is becuase if there are no Wf-Fi signals and the iPad use 3G to download whatever you want to download, when you do get into range of Wi-Fi signals, the iPad have to finish downloading on 3G so you can get the whole package. If it stopped on 3G and start on Wi-Fi, it may have a hard time trying to get the same packages of data. How do Wi-Fi start off what 3G left off? You would need to log-on to Wi-Fi first then tell iPad to fetch what's left of the downloading you were in the middle of.
Bit like say, someone is using morse code over old fashion radio then suddenly someone steps forwards and says: "We'll take over with the messages, we have just invented the telephone." right slap bang in the middle of the communications.
Maybe it makes senses for 3G to finish first, then you can close the app, then open it again, and it will now use Wi-Fi? Same way as you should let the guys with the morse code finish their communications first, then after that, you can use the telephone for any next communications?
Last edited by Major Eazy; 12-16-2010 at 03:14 AM.