Thunderbird can't write letters without restart

[Nio Wiklund]

Hi,

In my production machine I run Ubuntu with lubuntu-desktop

After the update yesterday (Sept 19 2013). I have a problem with Thunderbird

The window to write letters (or reply to letters) is borked. There is no
cursor, and although it is focused, the active window is still the main
Thunderbird window, so I can't write anything. This happens after
running Thunderbird for a while, and I have to close and re-open
Thunderbird to be able to write a letter again.

[CODE]$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.3 LTS
Release: 12.04
Codename: precise
$ uname -a
Linux ssd-grund 3.2.0-53-generic-pae #81-Ubuntu SMP Thu Aug 22 21:23:47
UTC 2013 i686 i686 i386 GNU/Linux
[/CODE]

I have Thunderbird 24.0 from the repositories.

-o-

If you have the same or a related problem, please add that you are
affected by this bug too.

https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1228002

-o-

Written from a fresh restarted session of Thunderbird,
with best regards from
Nio