Notepad++: Ctrl-S does not Save, instead inserts [DC3]; Ctrl-F inserts [ACK]

keyboard shortcutskeymapnotepad

I've been using Notepad++ more as my primary code editor. Just a few minutes ago, however, I accidentally pressed some combination of keys (no idea what I pressed) and suddenly my standard shortcut keys no longer work.

When I press Ctrl-S, it doesn't save my document; instead it inserts this funky little "DC3" character (looks like a rounded black rectangle with white text inside). When I press Ctrl-F (the Find key) I get a similar "ACK" symbol.

The only answer I've found on the web has to do with changing your shortcut key mappings; however my shortcut key mappings have NOT CHANGED at all, they are still set as they should be, with Ctrl-S mapping to "Save" and Ctrl-F mapping to "Find..".

I've clearly switched to some bizarre alternate key mode, but I have no idea what that might be or how to get rid of it.

Update: I've played around a bit more to see what other shortcuts are broken. So far, they all seem to be, except for the Windows standard ones like "Ctrl-X" and "Ctrl-V". Here's a sampling:

KEY             Should Do:            Current Behavior:

Ctrl-Tab        Cycle open tabs       <does nothing>
Ctrl-W          Close current tab     [ETB]
Ctrl-N          Open New tab          [SO]
Ctrl-O          File Open window      [SI]
Ctrl-A          Select All            [DC3]
Ctrl-Z          Undo                  <Works as expected>
Ctrl-C          Copy selection        <Works as expected>
Ctrl-U          Make lowercase        [NAK]

Best Answer

Ok, this is pretty pathetic. But it's possible some other moron could run into this issue so I feel justified in posting.

A few minutes ago I did a "Replace all" in my current document. Apparently, the dialog window informing me that "# occurrences were replaced" was hidden under another window, so I never closed it.

And apparently, when that little window remains open, pressing shortcut keys with the main editor window in focus causes those funky results.

It's strange behavior, to be sure, but it's still a pretty newb-ish scenario. Ah well.