Delete line / ctrl+y (cmd+y) not working in PyCharm on mac

Using IntelliJ IDEA, cmd + y works fine to delete lines. On this same computer in PyCharm, cmd + y gives me "definition of ..." instead.

Anyone know how to fix this? Not being able to delete lines is annoying and I'd very much want the same keyboard layouts in both programs.

I'm running os x 10.8.3.

Thanks!