I switched from Seam-2.1.0.A1 to Seam-2.1.0.GA and I found that now Wicket components which extend other wicket components (which extend WebPage) do not work anymore.
e.g. when Comp2 extends Comp1 which extends WebPage, Comp1 works fine but Comp2 when called produces the following error:
Caused by: java.lang.NullPointerException
... 46 more
Looking inside the instrumented objects, I found that Comp1.handler point to WicketHandler while Comp2.handler points to null, which probably causes the error.
To replicate the problem try to extend some wicket component (which extends WebPage).
thanks in advance
JBoss-4.2.3.GA, Seam-2.1.0.GA, Wicket-1.3.4, ubuntu-8.04.