Create a workflow and save a KAR (KAR1). Note the LSID. Change the workflow in some recognizable fashion and save a KAR (KAR2). The LSID bumps as expected. Close the workflow and open KAR1. Make a different change (so it's obviously not the workflow in KAR2) and save the KAR (KAR3). Notice that when the workflow reopens, it looks like KAR2 because it is KAR2 down to the MOML in KAR3.
I'm observing this at r22183 right now.