[rules-users] Building Guvnor - Required Java version?

Hi folks, Having grabbed Guvnor from github and switched to the 5.3.1.Final tag, I'm getting test failures when in the IDE project. Now, I' am admittedly building with Java 1.7.0_02, so that may be the issue. Has anybody else tried building with Java 7? Did you experience success/failure in doing so? I'm just wondering whether I need to install a version of Java 6 just to get this building or whether the issue is likely to be something else. Many thanks, Steve p.s. Build summary below... [INFO] Reactor Summary: [INFO] [INFO] Guvnor multiproject ............................... SUCCESS [0.933s] [INFO] Guvnor repository connector multiproject .......... SUCCESS [0.126s] [INFO] Guvnor repository connector JCR ................... SUCCESS [2.029s] [INFO] Guvnor repository connector Jackrabbit ............ SUCCESS [1.132s] [INFO] Guvnor repository connector ModeShape ............. SUCCESS [1.301s] [INFO] Guvnor repository ................................. SUCCESS [8:22.963s] [INFO] Drools and jBPM IDE common ........................ FAILURE [15.296s] [INFO] Guvnor web application ............................ SKIPPED [INFO] Guvnor bulk importer .............................. SKIPPED [INFO] Guvnor examples ................................... SKIPPED