When you distribute an iphone/ipad universal app do you compile it against the 3.1.3 SDK or 3.2? When are some of the settings?
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I just built an app with 3.1.2 that was just accepted into the app store. Building with a lower version will ensure compatibility with people that are running older versions of the OS on their iphone/ipod touch.
EDIT: you should compile with 3.2...see my comment below.

Banjer
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does the same binary run on the iPad? – Erin Jun 15 '10 at 23:57
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AFAIK, you need to compile with 3.2 for your app to be universal, i.e. for it to run on iPad as well. – Banjer Jun 16 '10 at 00:08
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Base SDK should be 3.2, see [this question](http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-for-multiple-firmwares/3027213#3027213) for some more details about targeting different SDK versions. – progrmr Jun 16 '10 at 01:05