Switched to the new mobile optimized version of the site. I got motivated to do this after I heard that Google was down-rating non-mobile sites. I also wanted to try the media queries and the new picture element, where I can serve client dependant image resolutions.
Now the image size is changed depending on the browser width (Firefox 38+ needs a page reload to notice this, but Chrome updates this immediately). The behaviour can be changed by switching the resize button (top right) from "auto" to "small", "medium", "large" and "auto" again.
The TV effect can be changed with the monitor button (directly next to the resize button. This toggles between "TFT" and "CRT".
I hope this will work correctly for everybody. It is supposed to degrade gracefully, but it is still quite new technology, so it may fail.
In addition to that I also enlarged the thumbnail sizes, allowed for animated thumbnails and added/updated several images.