Built-in compilation messed up for Maven projects?

Hi,

I moved on to the latest 13.1 EAP 134.1160, and something strange has happened to the way my projects are built.
It looks like change tracking does not work anymore, which means there's no way to force a recompilation of a project.
I had all sorts of problems with unit tests failing, because the changed sources in dependencies were not recompiled.
Not it has finally got itself into a complete pickle. I ran "mvn clean" on a number of upstream modules in the project, and they have never been recompiled. Rebuild Project does nothing.

I wonder if it is because of the below:

2014-02-26 15:20:42,739 [95086381]   INFO - ij.compiler.impl.CompileDriver - COMPILATION STARTED (BUILD PROCESS)
2014-02-26 15:20:42,852 [95086494]  ERROR - ij.compiler.impl.CompileDriver - Could not initialize class io.netty.channel.VoidChannel
java.lang.NoClassDefFoundError: Could not initialize class io.netty.channel.VoidChannel
    at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:265)
    at io.netty.bootstrap.AbstractBootstrap.doBind(AbstractBootstrap.java:234)
    at io.netty.bootstrap.AbstractBootstrap.bind(AbstractBootstrap.java:230)
    at io.netty.bootstrap.AbstractBootstrap.bind(AbstractBootstrap.java:219)
    at com.intellij.compiler.server.BuildManager.e(BuildManager.java:1017)
    at com.intellij.compiler.server.BuildManager.scheduleBuild(BuildManager.java:576)
    at com.intellij.compiler.impl.CompileDriver.a(CompileDriver.java:527)
    at com.intellij.compiler.impl.CompileDriver.access$200(CompileDriver.java:122)
    at com.intellij.compiler.impl.CompileDriver$8.run(CompileDriver.java:714)
    at com.intellij.compiler.progress.CompilerTask.run(CompilerTask.java:167)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$TaskRunnable.run(ProgressManagerImpl.java:464)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:178)
    at com.intellij.openapi.progress.ProgressManager.executeProcessUnderProgress(ProgressManager.java:209)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:212)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess(ProgressManagerImpl.java:171)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl$8.run(ProgressManagerImpl.java:373)
    at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:419)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:724)
    at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:149)
2014-02-26 15:20:42,852 [95086494]  ERROR - ij.compiler.impl.CompileDriver - IntelliJ IDEA (Cardea) IU-134.1160  Build #IU-134.1160
2014-02-26 15:20:42,852 [95086494]  ERROR - ij.compiler.impl.CompileDriver - JDK: 1.7.0_40
2014-02-26 15:20:42,853 [95086495]  ERROR - ij.compiler.impl.CompileDriver - VM: Java HotSpot(TM) 64-Bit Server VM
2014-02-26 15:20:42,853 [95086495]  ERROR - ij.compiler.impl.CompileDriver - Vendor: Oracle Corporation
2014-02-26 15:20:42,853 [95086495]  ERROR - ij.compiler.impl.CompileDriver - OS: Windows 7
2014-02-26 15:20:42,853 [95086495]  ERROR - ij.compiler.impl.CompileDriver - Last Action: Run
2014-02-26 15:20:42,987 [95086629]   INFO - lij.compiler.impl.CompilerUtil -     COMPILATION FINISHED (BUILD PROCESS); Errors: 0; warnings: 0 took 119 ms: 0 min 0sec

Please advise.

Kind regards,
Sergei