Redundant Key Signature Bug
While working on a piece, I noticed that a redundant key signature somehow appeared in the middle of the score. I tried deleting it and using the Cut feature, but I only managed to get rid of it after changing it. I'm using version 3.4.2.9788, if that helps.
Comments
Update to 3.6.2, that at least prevents this (known) issue from happening again (it dodes't fix scores having that issue already though)
To fix the issue more permanently in existing scores, go to Format / Style / OPage, disable courtesy key signatures, save, close, reload, then go back and turn that option back on. But indeed, you need to update if you don't want to keep getting hit by it or other already-fixed bugs.