ctkPluginContext::getService<>() fails when called from QT enabled plugins in release mode. This is due to line 31 of usServiceInterface.h:
#if defined(QT_DEBUG) || defined(QT_NODEBUG)
QT_NODEBUG should be QT_NO_DEBUG.
Sascha and I just figured that out and he would like to have it fixed in the upcoming release.