After the UFO disintegrates the bedroom door, it alternately reappears then disappears.
When the panther shuts the book on the tiny UFO, the book's color and the content on the pages inside change several times in the same scene.
When the UFO zaps the refrigerator, the refrigerator is no longer positioned where it was a moment before and is now set against a background view of the kitchen that's completely out of perspective with it.
The panther leaves the UFO in a butterfly net on the desk, but when the scene cuts back the desk is missing from the background, leaving the net hanging in the air.
When the panther is looking through the microscope, the UFO's staircase suddenly disappears before it's supposed to.
The UFO zaps the Pink Panther's recliner but it doesn't disappear at first, then in the next shot, it's gone.