I tested this with several applets, all show the same behaviour * left-click on the clock to open calendar, then middleclick on a date * middleclick on an item in the klipper popup * middleclick in the powerdevil popup * middleclick on an entry in mediacontrol popup If the popup comes from an applet in a panel the note is created in that panel. If the applet is on the desktop, the note will appear there. The note often is empty, but sometimes it contains the single word "click". Especially in the panel this is quite distracting, as removing the notes requires quite some steps (and micro-aiming with the mouse). Is this a bug or a (weird) feature? Reproducible: Always
Little addition: Middleclick on systray icons (especially active ones, so not hidden) also adds notes applets. So this is not restricted only to middleclick on popups. However middleclick on e.g. the clock does not trigger this issue.
Git commit e823ec848859658205b38280dbde78b2f3cb79b7 by Kai Uwe Broulik. Committed on 18/02/2015 at 13:35. Pushed by broulik into branch 'master'. Ignore single actions on popups Changelog: Sticky notes no longer appear when middle clicking a plasmoid popup REVIEW: 122623 M +11 -2 src/scriptengines/qml/plasmoid/appletinterface.cpp http://commits.kde.org/plasma-framework/e823ec848859658205b38280dbde78b2f3cb79b7