I am running Mint 13 with Cinnamon 1.6 & have just tried to create a custom shortcut to close a window - the default is Alt +F4. I cannot find a way to make my choice of custom short-cut - Alt+Z - stick. It just reverts back to the default Alt+F4 shortcut. I have found some suggestions via Google but don't want to mess things up further by tweaking code.
Suggestions would be welcome as I really need some custom shortcuts for my DE.
Big thanks in advance!