Hi

in my dolphin, all Preview-Images (Thumbnails) of Images are extremely unsharp/blurred.
PNG, JPG, BMP, even SVG. The preview of a TXT-File and default Icons are sharp.
(The images itself are sharp, of course. Gwenview and other programs display them correct.)

I can't find anything on this problem and i don't know where to look further.

Any suggestions?

thanks in advance

( Dolphin 4.13.3 under KDE 4.13.3 on Kubuntu 14.04.3 LTS )