Hello terrycym,
The reason as to why there are two of each cover art files is that there is an original copy of the image, and smaller version of it. If you look at the end of the file name, you'll notice half of them end with "thumb". These files are only 200x200 pixels and are used to generate the backgrounds and the Current By Album view of the Max. We will try and fix the issue with the BDP-1's front panel for our end of September release, if not then we will most certainly have a fix in the following release, thank you for bringing this to our attention.
Leaving the BDP-1 on 24/7 is perfectly fine, the hardware used in the BDP-1 consumes so little energy that it doesn't even require heat sinks to be cooled and generates very little heat.
The BDP-1 is suppose to save a copy of the existing music database to its internal compact flash card. This database is then restored during startup, however the BDP-1 still displays "Updating" at startup while it check the integrity of the data. whether or not any drive have been removed or added since the BDP-1 has been turned off. When this occurs, your music should still be accessible and you should be able to start playing music immediately.
Chris