I'd like to help you Thomas, but I kind of get confused when reading some of your tickets. It's like reading your thoughts and not being sure of the final conclusion. (Sorry if that is a harsh formulation. I really do want to help.)

I don't think I do anything out of the ordinary which should cause problems, but I am willing to look into it. Could you reduce this to a single problem: A specific menu item and the erroneous behavior you see. We'll see if I can fix that and move on from there.

Thanks for the hint on the Edit menu. I've removed the duplicate menu items.

I'm sorry, I had some other tasks but tried to make my point.
Ok, let's try.

First issue:

MM doesn't remove shortcuts when the Apple keyboard pane assigns them to some menu entry. (I got it backwards some hours ago, sorry!)

• Assign a shortcut used for some function to some other menu entry.
• Expected behavior: shortcut for new function, removed from old one.
• Fails sometimes

Ok, after some figgling I've got an idea for a pattern: it's about the 'toggling' menu entries with 'Show/Hide'.

Example: I assigned ctrl-opt-cmd-D to 'Delete Mailbox'.

'Delete Mailbox...' vs. 'Show/Hide Mailboxes' ended up with the same shortcut: ctrl-opt-cmd-D.

After some testing: same with 'Hide/Show Message View', ctrl-opt-cmd-H and 'Forward as Attachment'

I suspect it's not MM's original setting for the 'Show/Hide' menu entries but none of them is in the keyboard pref pane.

Could it be that the shortcuts got mangled up somehow on my Mac?
Let me know if I should send any files you or whether it may help to delete/restore some settings.

+- Flagged, +- Read: Sorry to mention it again, yes it is #45.

But it just doesn't work, it's apparently limited to those two flags, and I haven't seen this issue elsewhere (well, in well-behaved Mac citizens...).

Neat, #86 as internal link format.