Icon path restricted error when building release version for ipad3

Hi,

i get the following error when building the release build ipa file for ipad 3: "The path icon.png is restricted. If you were trying to package Icon.png you should correct the case."  In debug mode everything works. My icon is under assets folder and added in the app-xml with:

Did I missed something in configuration? Seems to be that the problem is known but cant find a solution for it. If i try to packegae per command line despite the fact building works I could not install the app. When I change the icon tag to use no icon everything works fine. Any ideas?

Greetz and thanks in advance!