Is there nobody then whom can shed some light on my questions, are they to difficult?
I've been looking at the thumbnails, and seem to have to conclude following.
-The issue is not the resolution, the issue is width to height ratio.
For folder.jpg/videofilename.jpg/series.jpg, under the different viewing modes.
-List with preview: Ratio 1.25, 321x250
-Picture: Ratio 0.98, 225x230
-Music: Ratio 0.75, 172x230
-Movie: Ratio 0.52, 120x230
Using above seems to give the best out of the available space for thumbnails. Using different ratios will increase either of the black borders on the sides for the thumbnails. Using higher resolutions, but keeping the ratios does not seem to increase the thumbnail itself.
For list with preview, it does not seem to be possible to remove the dark borders on the side of the thumbnails.
-For the other issues, zoom question, music playlist on the fly, is there anybody that can shed some light on those?