I'm using Thomas excellent maven integration with GWT 2.8.0-beta1 in 
combination with super dev mode and tomcat. As generated by the maven 
artifacs.

I sometimes have really strange issues where it seems that the super dev 
mode updates do not seem to be correct. 
Suddenly I get ClassCastExceptions on types that should never be anything 
else, things that did not change at all.

Cleaning the mvn project and rebuilding does not work.
When I clean the %TEMP% folder of all gwt related artifacts then SDM works 
fine again.

This is really annoying since it is not always clear if I just added a new 
bug in my iteration or the SDM is serving something corrupted.

I was looking into avoiding this problem, by making sure that the GWT 
compile and SDM do not rely on the %TEMP% folder but use a folder inside 
the project target folder.
For that there are 2 different configuration parameters (work and extra):

I've set them to this in the pom.xml, yet I still see files being generated 
in the %TEMP% folder.

<workDir>${project.build.directory}/gwt/work</workDir>

<extra>${project.build.directory}/gwt/extra</extra>


Did these parameters change in GWT 2.8.0-beta1 or are there other folders I 
need to reconfigure or is there an issue in the maven plugin ?
I see CssResources, Gin related files and gwt- files being generated in the 
%TEMP% folder regardless of my settings.

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