It's a weakness of OpenLaszlo that much of the dataset behavior is based on old Flash runtime capabilities. That is true for setting the enctype multipart/formdata for datasets using HTTP POST as well. It's technically possible to support that enctype for both runtimes, and it would enable us to attach binary data (e.g. image data) to dataset requests.
multipart/formdata delivers better performance as well. Are you planning to support multipart/formdata for the 5.0 release? If not, what are the reasons?
