Just trying out IOS 4 on my 32GB 3G Touch but found a lot of 3rd party applications that won't update via Wifi. Safari & App Store for example work fine, this only affects 3rd party apps. Testing the same on my iPhone 3GS still on v3.1.3 works fine at the same time so I know it is not the remote servers that are the issue. Anyone else seeing this?? It looks like a reworking of some networking component in IOS4. Could mean a wait for app developers to catch up.