GWT 2.6.0-rc1 Super Dev Mode on Windows 8 and Eclipse

Getting this error message, when starting Super Dev Mode with GWT 2.6.0-rc1:

Exception in thread "main" java.lang.VerifyError: class com.google.gwt.dev.codeserver.Options$NoPrecompileFlag overrides final method getPurpose.()Ljava/lang/String;

at java.lang.ClassLoader.defineClass1(Native Method)

at java.lang.ClassLoader.defineClass(ClassLoader.java:800)

at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)

at java.net.URLClassLoader.access$100(URLClassLoader.java:71)

at java.net.URLClassLoader$1.run(URLClassLoader.java:361)

at java.net.URLClassLoader$1.run(URLClassLoader.java:355)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:354)

at java.lang.ClassLoader.loadClass(ClassLoader.java:425)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)

at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

at com.google.gwt.dev.codeserver.Options.parseArgs(Options.java:53)

at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:45)

When using GWT 2.5.1 I get:

java.io.IOException: can't create app directory: C:\temp\src\org.jdownloader.gwt.myjdownloader.MyJDownloader

at com.google.gwt.dev.codeserver.AppSpace.create(AppSpace.java:61)

at com.google.gwt.dev.codeserver.CodeServer.start(CodeServer.java:83)

at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:50)

Beforehand under Windows 7 I had no problem with Super Dev Mode. Under Windows 8 I can't get it to work.

Any ideas/hints?

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To post to this group, send email to google-web-toolkit@googlegroups.com.
Visit this group at http://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/groups/opt_out.