latest version in the tree kde-misc/kwebkitpart-0.9.6 latest version released 1.2 do note "KDE 4.5 or greater is required for building and running KWebKitPart." guess that is about version 1.2 KDE 4.5 or greater is required for building and running KWebKitPart. Reproducible: Always
ups the stable branch have relocated https://projects.kde.org/projects/extragear/base/kwebkitpart/repository/show?rev=1.2 XD
With kwebkitpart-0.9.6 and konqueror 4.4.x, this web page http://www.infodidac.org/compteco/pcmn.xml is properly displayed. But not with kwebkitpart-0.9.6 and konqueror 4.6.x.
Bumped to version 1.1.1, that is the newest tag in upstream's repository. (No tarballs available at all.)