yep, Ui.allow_platform_file_picker had been overridden to false (no idea how/why; *I* never set it manually). changing in about:congit false->true, now the Open/Save dialogs correctly use KDE4 Dolphin's file picker! Wolfgang -- after discussions onlist a while ago (which died away ...), is it still your integration to get these KDE-integration fixes into upstream? Are they open to it?