I have a completed application that runs great on 2nd Gen iPods, as well as iPhone 3GS and 4. However, when running the app on a 4th Gen iPod, low memory crashes are not uncommon at all.
When I run the app through XCode using the "Activity Monitor" performance tool, I noticed that the application requires roughly 2 to 3 times as much "Real Memory". For example, while the app is consistently between 30-35 MB on the 2nd Gen iPod, on the 4th Gen it fluctuates between 70 to 100 MB (hence the low memory crash).
Has anyone else run into this? Is this drastic increase in memory usage on the 4th Gen to be expected? It's kind of ridiculous to get frequent crashes on the new device that has twice as much memory, when I've never had any problems with memory on the older 2nd Gen.