Has anybody else encountered the following bug with the new Eclipse BPMN editor (the one recently rolled out with 5.3) ? :
After creating a few tasks and gateways, the graphical diagram shown on screen suddenly disappears. Viewing the underlying XML source shows that the bpmndi-based tags (i.e. those belonging to the namespace that contain the graphical layout information) have disappeared. All the bpmn2 tags are intact however.