Please check the changelogs for all additions that have been added between your release and the most recent version. Besides many other changes one of the biggest improvements is that the system uses ffm for local videos because some users did complain that gst did create distortions when playing certain video file formats. In addition the performance has been tuned etc.
You could use morly's tool to create a backup of your current image and if for some reason you would experience difficulties with the newest image you can still revert back to the old image.