Build 9779 breaks Maven classpath of multi module projects. Resources from dependent modules are not always available in main module on classpath when some class/test is executed. So when I run my tests using run icon, I get some failures. Then I use Debug icon instead of Run on the same class, and everything works fine. Then I go back to Run, and it works fine too. This classpath problem appears to affect only Run and not Debug, and it seems using Debug once on the class fixes it.
IntelliJ IDEA 8.1 9742 didn't suffer from this problem. Also Idea 7.0.6 works fine.