This is not a KPDF bug, and not an Okular either, but Poppler's.
KPDF is patched by ubuntu for using the Poppler library (thus totally unsupported by us), and Okular uses Poppler directly.
This is not a KPDF bug, and not an Okular either, but Poppler's.
KPDF is patched by ubuntu for using the Poppler library (thus totally unsupported by us), and Okular uses Poppler directly.