code: public String getContentType() {
  		ContentTypeHeader cth = (ContentTypeHeader) this.message
  				.getHeader(getCorrectHeaderName(ContentTypeHeader.NAME));
  		if (cth != null) {
  			// Fix For Issue http://code.google.com/p/mobicents/issues/detail?id=2659
  			// getContentType doesn't return the full header value
  //			String contentType = cth.getContentType();
  //			String contentSubType = cth.getContentSubType();
  //			if(contentSubType != null)
  //				return contentType + "/" + contentSubType;
  			return ((HeaderExt)cth).getValue();
  		}
  		return null;
  	}
docs: /*
  (non-Javadoc)
  @see javax.servlet.sip.SipServletMessage#getContentType()