Bug#924740: plasma-desktop: plasma activities preview fails with svg wallpapers

[Larus Contract]

The same problem happens when the background is set to a solid colour or 
slideshow; it looks exactly like with an SVG. I would have expected to see the 
colour or a preview of  the image which is currently set as background (meaning 
the current item of the slideshow) to be put into the preview.
Obviously it's the same with Hunyango or Haenau, but I couldn't test image of 
the day, as there doesn't seem to be a provider available.