Need clarification on basic facts about universal app

[firearasi]

I am trying to update my existing iPhone application to a universal one. But something very simple is still confusing me. When I build a universal app, there is only a single output of binary file, thus when I build the app using 3.2 Simulator, the output should be directly runnable by 3.0 Simulator. Well this is true. But when I tried to do the same experiments for the build setups Debug 3.2 Device and Debug 3.0 Device, a pop up message board says that the iphone os on my iPod touch is too low. So what I am missing here, since I am building a UNIVERSAL app?

[firearasi]

Well I need to set iPhone base sdk to 3.2 and iPhone deployment target to 3.0.

It is hidden deep in the iPad programming guide...

[benoitr007]

Well I need to set iPhone base sdk to 3.2 and iPhone deployment target to 3.0.

It is hidden deep in the iPad programming guide...

I thought I'd done that but apparently not... Thank you! I did that and reuploaded the binary to iTunes Connect and guess what? It says "Minimum OS Requirements : 3.0". Awesome! Let's hope it's approved now.

[scotopia]

I'm confused about something. It seems obvious that in order to build a universal app ready for the launch we have to use the 3.2 beta 5 SDK...but right in the download tab it says

"iPhone SDK 3.2 beta 5 is for development purposes only and should not be used for submitting applications to the App Store."

Confused?