When Deploying an application, it doesn't show the path, but rather shortens it the C:\fakepath
This is no t a problem with Mule.
Please fill MMC bugs at http://www.mulesoft.org/jira/browse/MP
Actually it's not related to MMC but to some browser providing better security.
See following links for more context:
Please do not create an MMC bug !
Depending on your browser you might have an option to restore expected (but potentially unsecure) behavior.