Intellij IDEA doesn't recognize the Super_L/Meta-key as part of a shortcut or individually, while Super_R is strangely recognized as "Windows"-key. Both as part of existing shortcuts (no recognition, so Meta+Strg+J is the same as Strg+J) or when trying to use it in the shortcut search (just pressing it opens the Gnome shell-menu, but otherwise same behaviora s above)
This seems to be a pure Intellij Idea problem, because shortcuts involving either Super_L or Super_R are properly detected and the keys are also labeled properly (e.g. not as "Windows"-key).
This should also not be part of this problem, because the related bug got fixed.
I installed Intellij Idea 14.1.4 via Fedy