Not Accepting Keyboard Input

[Weird Odd Wodd]

I noticed that Dolphin has stopped accepting keyboard input in some areas. As an example, I discovered that screenshots were not being taken when I pressed F9 while playing a game. I also noticed that pressing Escape did not bring up the user prompt to end or resume emulation and that Alt + Enter did not switch between full-screen and windowed modes. However, the main window (where the ROMs are shown [if present]) does accept keyboard input. (Pressing Alt + F opens the File menu. Pressing Alt + E opens the Emulation menu. …) After reading a similar thread, I tested using the keyboard in the controller configuration screen. I verified that that screen also was not accepting input from the keyboard after clicking a controller button slot to assign a keyboard key to it. Pressing Escape does close the window, however.