PLT 12.5.1 says, in part:
If the portlet does not specify a content type before the getWriter
or getPortletOutputStream methods the portlet container assumes the
content type of the PortletRequest.getResponseContentType()method
and resolves wildcards on a best can-do basis.
This is a change from JSR-168 PLT 12.3.1.
286-COMPATIBILITY is not performing the default case, requiring portlets to
set the content type explicitly. I have not looked at the code in the
286-MERGE branch.
For the time being, I have hacked around this in the 286-COMPATBILITY
branch. Do you want the fix, or should we just ignore it until the
286-MERGER branch is further along?
--- Noel