base64-encoded binary attachment parts are not decoded correctly

I'm adding swa/mtom support to soapui and noticed thaat when sending attachment parts containing binary data, these may be encoded by javamail/jaf using base64 encoding, ie;

------=MIME-boundary
Content-Type: image/gif
Content-Transfer-Encoding: base64
etc..

which seems to be allowed in the attachment profile (R2934).

Internally in jbossws, the SwapableMemoryDataSource created in the MultipartRelatedDecoder.decodeMultipartRelatedMessage method does not seem to handle this but returns the base64 data is if it we're unencoded..

maybe I've got something wrong here?! (if I force javamail to use "binary" encoding it works fine)

regards!

/Ole