I'm getting these critical warnings for KStandardActions. I understand the reason to notify the application developer that he should set a default shortcut instead of the shortcut but this should not be done for standard actions or KActionCollection::addAction should properly set a default shortcut for standard actions. Either way the issue is in the KXmlGui framework. Critical:Shortcut for action "file_new" "&New" set with QAction::setShortcut()! Use KActionCollection::setDefaultShortcut(s) instead.
Am also annoyed by those warning, enough to try a first approach to it with some patches: * https://git.reviewboard.kde.org/r/120024/ * https://git.reviewboard.kde.org/r/120025/ * https://git.reviewboard.kde.org/r/120026/ Not sure this perfect solution yet, as I still miss the complete picture. But it might be one step into the right direction.
Fixed by https://git.reviewboard.kde.org/r/120088/ it's a shame that bug reports are not maintained.