When you'll be updating the shortcuts card to "7.2" please consider adding the following two really basic shortcuts for working with the editor windows.
1) Ctrl-Alt-PgUp/PgDown: Shortcuts for switching between editor types (e.g. Source, Design, History buttons) should be mentioned on the Keyboard Shortcuts Card that opens from the Help menu.
Switching between the editor types is a frequent operation sometimes, e.g. when using GUI builder, and while it can be done easily via mouse, or from View | Editors menu, it is very handy to know the shortcuts as well.
2) Ctrl-PgUp/PgDown: Similarly it's strange that the shortcuts for switching to next/previous opened document (tab) in editor are missing. Note this is not like Ctrl-Tab that cycles in the last used order, but going through the tabs as they appear in the editor.
Both shortcuts should fit into the "Opening and Toggling between Views" section. I think these are important to mention on the card because they are not visible anywhere else in the UI (as there are no menu items like "Go to next/previous editor type" or "Go to next/previous document").
BTW the "Alt-Shift-D Undock window" mentioned in the same section is wrong. The shortcut is for "Dock" action, but that is normally disabled. You have to "undock" first, which is done via "Float" action that has no shortcuts. IMHO not worth mentioning on the card, not really useful.
Updated shortcut card for PC to add shortcuts.
Did not update OS X shortcuts because the pgdn and pgup keys are not usually used
Integrated into 'main-golden', will be available in build *201206090001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: kganfield <firstname.lastname@example.org>
Log: #213815, update shortcuts for pc for switching views, editors