Strange problem with portlet containers

[Ping]

Hi all,

I'm having a strange problem. I'm using myGWT for some experiments
with portlets. I am deploying a portlet to jboss portal, and to
another portlet container. The portlet is gwt-based. The portlet only
renders ok in the other portlet container. In jboss portal under
firefox, the width is not set correctly. You can see the error here:
http://web.ist.utl.pt/miguel.ping/screen.jpg

I posted a msg on myGWT forum, and it seems the error is not related
to myGWT. I have been debugging it, and I drilled down the problem to
the DOM.setIntStyleAttribute() method. The width is not properly set
when this method is being called on jboss portal / firefox.

I'm positive about the problem being around the
DOM.setIntStyleAttribute, but I do not understand what's happening.
Another strange thing is that gwt is calling a different .cache.html
file for each portlet container, under the same browser, ie:

* jboss portal / firefox >>
0D200DD1E6FC35C78A7099D7776B7F1C.cache.html
* other portlet container / firefox >>
610C6444913DE9D8676585E5FA3EC13D.cache.html

Should I include the file with the -xs (cross site?) extension
'MyModule-xs.nocache.html'?