By default darktable use rawspeed as backend and on Pentax K-x images it add a lot of magenta. Here is rawspeed backend: http://img-fotki.yandex.ru/get/5810/98043435.d/0_67a09_bd79631b_XXL.jpg Here is -DDONT_USE_RAWSPEED and internal libraw backend: http://img-fotki.yandex.ru/get/4410/98043435.d/0_67a08_d059191c_XXL.jpg Darktable can be build with libraw only backed: -DDONT_USE_RAWSPEED But this option and patch darktable-0.9.1-system-libraw.patch fails on building. Could you check patch for system libraw & -DDONT_USE_RAWSPEED option or make this optional with use flag? Reproducible: Always Actual Results: http://img-fotki.yandex.ru/get/5810/98043435.d/0_67a09_bd79631b_XXL.jpg Expected Results: http://img-fotki.yandex.ru/get/4410/98043435.d/0_67a08_d059191c_XXL.jpg
Enabling that option appears to unearth some parallel make errors and linking problems with the cmake scripts. I'll write another patch to fix things and add a rawspeed use flag that will be default for now.
Fixed in the latest revision in CVS.