Since the new preferences system has been turned on, new gadgets are not being saved in preferences, so no new gadget can be used at all.
Steps to reproduce:
- Create any new gadget, say some simple css - it doesn't matter what.
- Check the gadget in preferences and save.
What will happen:
- The gadget remains unchecked.
- The gadget isn't applied at all.
What should happen:
- The gadget should be checked.
- The gadget should do desired changes where applicable.
Categorizing as MediaWiki -> User preferences rather than MediaWiki Extensions -> Gadgets, since it's most probably caused by new preferences system rather than by gadgets code.
Version: unspecified
Severity: major