I narrowed it a bit.
Seems to be a bug in jboss i think (classloder,classpath issue).
This error occurs when you have more than one war using struts.
It depends on the sequence you deploy your wars.
I have one war (a) using Struts 1.1b and a war (b) using Struts 1.1
when I deploy (b) first and after that (a) everything is working fine.
when I deploy (a) first and (b) second i get that error !
I think jboss is putting WEB-INF/lib somewhere in the global classpath so things get broken !
So it seems not to be a struts-related problem
yep, it works for me, never tried it with mulitple struts WARs though, but should also work
mixing libs of different version in the same container is not recommended :-)
classloader troubles are the most fun, aren't they :-/