All debug statements in the kwin/clients/aurorae directory should be changed to Qt's new categorized logger using an own category AURORAE. The aurorae source files are also used inside kcmkwin/kwindecoration, it is important to define the category in a header included in both areas. The category also needs to be enabled in kwin/main.cpp. Full documentation is available in http://community.kde.org/Frameworks/Porting_To_qCDebug - this task requires a working build setup of kde-workspace in master branch.