Comment 8 for bug 615865

In my case, kdevelop was forcing libprocesscore4 and libprocessui4 to stay installed, while kdebase-workspace-bin requires libprocesscore4a and libprocessui4a. These new versions are incompatible with the previous ones. kdebase-workspace-bin was then REMOVED during upgrade to KDE 4.5, and this broke everything, leaving this blank screen.

It seems we need an upgraded kdevelop that doesn't depend on the old libs.