I got this problem: \"warning: iPad: Icon-72.png: icon dimensions (0 x 0) don\'t meet the size requirements. The icon file must be 72x72 pixels, in .png format (-19014)\" w
I found a solution thanks to a forum post on the official developer forums.
Seems to be a bug in Lion 10.7.3
While the solution of turning off Compress PNG images does work, it is not a good solution as it then no longer compresses PNG images. While not the most useful feature ever, it is standard and does obfuscate your images in your ipa which is usually a good thing.
This issue started with 10.7.3, today. No real solution has yet been put forward (other than to build your submissions with 10.7.2 instead.)
I installed Application Loader and the problem with Xcode got solved. Found the solution on Apple Developer forums here
If you are using MAC OS version 10.7.3 and iTune version less than 10.6.Then while archiving you will face this issue.
So don't worry.Please update your iTune store to latest version(i.e 10.6).It will work perfectly fine.