Posted to JIRA as:
http://jira.jboss.com/jira/browse/JBSEAM-2390
Since I am not able to post a comment into the jira ticket I like to announce, that the same things happen when having the gravel lib in the classpath. In this case, the seam multipart request is replaced by the GravelHttpServletRequest. I found this by debugging FileUploadRendererBase.doDecode().
The result is the same as with the trinidad libs. The setter for the byte[] is called with a null value.
Anyway, is there a workaround?
Bye, daniel