Seems to be an issue with the yellow bar notification (dbus isn't being handled properly by app manager - same issue happens if sudo is used).
Temporarily removing notifications during install, since, as suggested by someone, the user doesn't need to know what happens unless an error occurs (although I oppose this :P)

Uploading new package.

BTW, I never saw this error since I don't use the Application Manager.

Edit: going back to notifications, but using run-standalone.sh

Edit2: Those logs get reset at each application manager restart, so you can delete them.