The recent Cassini flyby of Jupiter provides a new unique data set in order to allow tracking of the instability along flow lines down to the distant magnetosheath, as yet unexplored by previous missions. Signatures consistent with mirror mode activity were frequently observed during the flyby in the magnetometer data, appearing at many different locations in the jovian pre- and post-dusk magnetosheath. Also reported and analysed were very distant mirror modes waves appearing as magnetic depressions observed at hundreds of Rj from Jupiter and much lower in amplitude than those observed closer to the planet. If these structures were convected from the upstream subsolar regions, such distant observations could allow an assessment of how highly stable they are. However, since some of the structures appear in sequence, they could also have been produced locally by a phenomenon yet to be identified.