Just noticed a similar, if not same, bug on the KDE tracking system. In the case of the reporter it was with a JPEG image. I added my note concerning it also appears with .eps files as well.
Adding upstream bug tracking number for KDE ** Changed in: gwenview (upstream) Importance: Undecided => Unknown Bugwatch: None => KDE Bug Tracking System #132429 Status: Unconfirmed => Unknown -- Rotating EPS leads to colour loss https://launchpad.net/bugs/29627 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs