On 26 May 2014, at 14:37, Ask Holme wrote:
[…] Can there be some form of collision so that cmd+i is checked before alt+cmd+i and so one shortcut effectively blocks the other?
Yes, for keymaps where | is bound to ⌥I the system will treat ⌥⌘I the same as ⌘| — there is no way for the system to know that you actually ⌥⌘I.
The only workaround is to manually rebind one of the keys to another key equivalent via System Preferences → Keyboard → Shortcuts.