Comment 33 for bug 306438

(In reply to comment #31)
> Comment from my Ubuntu bug https://bugs.launchpad.net/thunderbird/+bug/306438:
>
> > Right-clicking on the column names in the address book
> > includes a "Delete" option in the menu. Unfortunately,
> > this does not "delete" the highlighted column, but rather,
> > the highlighted contact. Ouch. Making matters worse,
> > there is no undo.
> >
> > Probably the simple fix would be to have right-click
> > on the column headings in the address book display a
> > different menu, or no menu at all.

I took a look and My understanding is the Right Context menu applies to the Pane in general, not the Col Head. To hide Col Heads, use the Col Picker at far right.

The second paragraph would be a separate bug from this bugs request.