Ugly character in NSMenuItem's key equivalent

Question

In my app's main menu I have a menu item that I'd like to set to the shortcut alt+"minus sign". I was able to set the key equivalent in IB, and it triggers as expected, but it's really ugly when running the app:

Even though in Interface Builder it's fine:

Do you have any idea why it's like that? Thanks!

Answer 1

This seems to be an OS X problem, here's a screenshot from Pixelmator:

And even Preview.app has the same problem/bug (View menu):