I just created a small sample demostrating my menu issue. No special things were added, no code from my project is included, and here are the steps to reproduce the problem (yu can just skip this and test included project):
1.- Create a new project.
2.- In main menu add a "File" and "Edit" menus.
3.- In Edit menu add Cut, copy and paste options.
4.- Add the shortcuts CTRL+X, CTRL+C and SHIFT+Insert respectively.
5.- Add a button in main dialog.
6.- Add a new form and make it appear when you press the button you added in main dialog.
7.- Add a textbox in second dialog.
The behaviour you will see is that the main menu shorcuts prevents anything else in your app from using the same shortcuts. Even standard shortcuts like the ones i added.
Help! :(
I won't say this is a Firefly issue. I will say this is default Windows behaviour.
When you put any shortcut (like Ctrl-X, Ctrl-C, etc.) in menuitems, it means that you are instructing the respective menuitem to intercept the shortcuts.
You have to to put codes in the menuitem to handle what you want to be done.
I made some addition to your project. It is attached.
They are derived from the FF's MDIEditor and PB's PBNote samples.