Most iPhone OS applications should work on the iPhone OS 4 Developer Beta. But as with any major revision of n operating system, there are sure to be some problems.
After the jump, a report on common applications I’ve run on my iPhone 3GS and the issues (if any) I encountered. I’ve had a fairly good success rate in running applications without a hitch, but there are a few that don’t do so well.
Working With No (Obvious) Issues
The Weather Channel Max
Knocking Live Video
Working With Minor Issues
Google (search results pages appear on a grey background)
Skype (works, but warns that it is not supported)
Working With Major Issues
Shazam (Loads, however cannot detect sound)
NYTimes – Crashes at startup
MLB At Bat – Crashes after startup