I've noticed drawings always get the "File edited by not saved" icon in the vault pane after every rebuild. This occurs with a completely blank drawing. Parts and assemblies don't do this - those files are only marked as needing saving if something has changed.

Any ideas why, and how I stop it requiring these unnecessary saves?

I'm asking this in the PDM forum because this is where it causes an issue, (lots of annoying errors if you then try to do a state transition or prompts to save if you close the file) but I think the issue might be more general than that.