Since the recent update, Midnight Commander is no longer honoring my keymap. The custom bindings are stored in ~/.config/mc/mc.keymap, and I've updated the file to bring in the latest changes from /etc/mc/mc.default.keymap. The main change in my file is to redefine ChangePanel from tab to ctrl-f, and then Complete from alt-tab to tab. With this latest version, ctrl-f doesn't do anything, and the tab key changes panels despite my settings. What I've done to try to debug:

1. Removed any potential collisions between my custom bindings and existing ones in mc.keymap.
2. Changed some other keybindings in the file. Those didn't have any effect either.
3. Tried manually specifying the keymap file at launch using the -K option. Still no effect.

So it seems like mc is just completely ignoring the keymap file now. Is anyone else having the same issue?

Have you tried removing the files in ~/.cache/mc, /root/.cache/mc, /tmp/mc-[user] &/or /tmp/mc-root files yet?

Not sure that would help but maybe...

Just did. No change. Have you tried reproducing the problem on your end?

I normally don't change key mappings. I did just test it and it's not working for me either.

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Thanks for the confirmation. I just reverted to the previous version, and custom keybindings work again. I guess I should file a bug report upstream.

I'm not sure if this is a change in mc but after playing around some more I'm able to get custom key mappings to work.

I removed the symbolic link /etc/mc/mc.keymap and created a modified copy of /etc/mc.default.keymap as ~/.config/mc/mc.keymap. It honored my change as a regular user. When I used mc as root the unaltered/original keymap was in effect.

Maybe the symlink is the issue?

Hm, it doesn't work here. I installed 4.8.26 again and removed the symbolic link, and my keymap still has no effect. It works fine on 4.8.25. In any case, the user keymap should take precedence over the system one. Just out of curiosity, what did you change in the keymap file to test?

I change the quit keymap:

to: Quit = alt-q
from: Quit = f10

Yeah, still no change on my end. That works with 4.8.25 but not 4.8.26, regardless of whether the /etc/mc/mc.keymap symlink is present.

Could it have something to do with #4107? Curiously, the ticket says: "This is the result of #3672."

Circling back to this thread, I figured out the issue. The name of the top section in mc.keymap changed names from [main] to [filemanager] in the most recent versions of mc, and I failed to update that in my user config (~/.config/mc/mc.keymap). A vimdiff comparing my user config to /etc/mc/mc.default.keymap revealed that right away. Should have checked that earlier.