In some cases Maya 2012 doesn't work properly with hotkeys, that you assigned in Hotkey Editor.
For example I use "z" key ("undo" by default) as "FrameSelected", so i assign it in Hotkey Editor.
But Maya simply ignore Hotkey Editor, and works by default.
This same problem with "ctrl+q" combination.
To solve this problem you have to find scripts/startup/hotkeySetup.mel and overwrite hotkeys ther as you like.
You can use any text editor for this purpose.
For example I use "z" key ("undo" by default) as "FrameSelected", so i assign it in Hotkey Editor.
But Maya simply ignore Hotkey Editor, and works by default.
This same problem with "ctrl+q" combination.
To solve this problem you have to find scripts/startup/hotkeySetup.mel and overwrite hotkeys ther as you like.
You can use any text editor for this purpose.