QtCreator 2.7.2 change JAVE_HOME setting it to wrongly dir

[Gianluca]

Dear all,
I've just installed the 5.1.0 final for android and I'm experience a weird error, and I don't know how to debug and resolve it.

JAVA_HOME environment variable is correctly setted to a JDK point where javac is present.
I'm sure that it is setted correctly because with the previous version of QtCreator (2.7.1) everything works fine, and I can compile, deploy and test android app on a mobile device.
But when I try to deploy the same project (exactly the same project) with QtCreator 2.7.2, the ant command fails reporting that it cannot find javac and what I can see from the error, the JAVA_HOME has been changed pointing to a different dir respect to what reported by QtCreator in the build environment dialog !!!

Who change the JAVA_HOME dir ?? and why happens only with QtCreator 2.7.2 and not with QtCreator 2.7.1 ??

Please, help me to find out how to solve this problem.

Thanks,
Gianluca.