Description of Problem:

Gnome terminal loses focus to actual terminal.
Switching tabs, operating menus, etc all work, but
the cursor remains hollow, and no typing goes there.

A [left, primary] click on the terminal widget
itself restores focus and returns application to
normal.

TAB also does the same, since it cycles to the
terminal widget next.

Sacrificing goats has no effect.

Steps to reproduce the problem:
1. Attempt to drag a tab.
2. *or* sloppily click on a tab, moving the mouse
slightly when down. (Same thing, but unintentional).
3. 

Actual Results:

Tabs cannot be dragged. Tabs hold focus.

Expected Results:

Either the tabs could be dragged to a different
Terminal window (Now *that* would be cool), or
else the focus is restored to the terminal itself.

I appreciate this is an accessibility problem -
sloppy clicks lose the focus, resulting in
confusion, but equally, you need to be able to
explicitly focus the tabs to switch between them
without the mouse.

However, there are menus and keyboard shortcuts
available to perform tab switching, and I don't
know of any way to focus the tabs via keyboard in
any case. (Actually, I don't even know of a way to
get to the menu in gnome-terminal without the mouse.)

How often does this happen? 

Every time. This is fully repeatable. (Full moons
as yet untested)

Additional Information:

I mentioned this on an IRC channel, and someone
else (experienced Linux/GNOME user) immediately
commented that they'd had the problem too, figured
out the fix, but couldn't work out what had caused it.

By fluke, it happens that I was *trying* to drag a
tab earlier, and realised what had gone wrong.

I've tested 2.4.2 and 2.6.1, both have this problem.