Maybe you have version 3.0.1 on your iPhone, then you have to follow the iPhone 3.0.1 Advisory that you can download from the iPhone Dev Center. Or try downloading the 3.0 SDK from the same place, then you have to put it in users//library/itunes/iphone software updates (ipsw files). Then you’ll probably have to restart xCode or something.
Nope, avoided 3.0.1 for that very reason, so it most definitely is the first 3.0 update. Hmmm…
…and in fact my 1G iPhone is also OS 3.0 (7A341) and I do NOT get that message.
The test app (to test Unity iPhone 1.5) installed on both (and performed AMAZINGLY btw) just fine, and ran just fine with no burps from XCode so the message isn’t barring me from building so… ::shrugs::