Due to my crippling tab addiction, I usually have about 30 open when working on a workflow. Sometimes I inadvertently start working on an old tab of a workflow only to realize later that the work I had done previously was not there anymore and I have to choose to implement the work again, or revert to the previous version and recreate the work that I did in the old tab.
It would be great if the workflow editor periodically checked to see if you are editing the latest version of a workflow and notifying you if you are not.