Have witnessed the issue from 5.5 to CC on OSX.
Opening a .PSD that has a font being used that is not installed on the current system, entering a text box with the missing font (see image attached), pressing escape or cancel after the warning dialog about not having the font installed pops up renders the toolbox keyboard shortcuts unusable.
After that has happened, I can no longer press V to get to the move tool (or any shortcut to get to any of the tools). If you enter a text box that does have an installed font, press escape or cancel like before the keyboard shortcuts get restored.
