krita-1.5.0.ebuild should depend on libexif-0.6.13-r1. Krita's jpeg plugin is not compiled using an older libexif (mine was libexif-0.5.12-r3). Not having support for jpeg files in krita is really annoying. Krita compiles ok using libexif-0.5.12-r3 but when openning a jpeg file it complaints that it couldn't create a filter chain.
Done in 1.5.2-r1