evolution compose widget not updating correctly

Binary package hint: evolution

Don't know if this is an evolution bug, a GTK bug, or an X bug, but I only experience it with evolution on intrepid. It started happening yesterday. Start to compose a new message and start typing in the body of the message.. the text will show up in 3 places, where it should, on the top row offset by about 2 inches, and at the bottom of the screen offset by about 2 inches. Each keystroke seems to fix it for a split second and then it corrupts again. Covering the compose window and exposing it again doesn't cause the body widget (and only the body widget) to refreash. I'll post a screenshot. I'd suspect a GTK or an EXA bug, but I -only- experience this with evolution, and -only- in the compose message body widget... everything else seems fine.

Again, this worked fine until yesterday, but I update infrequently, so this could have happened anytime in the past week or so.

In the screenshot, you can see the obvious non-updating when a windows appeared over top of it, but the text I typed was 'this is a test', but you'll see that text 3 times in three different parts of the widget.

Hardware:
Macbook Pro radeon X1600
'ati' driver
EXA acceleration
metacity, no compiz running.

$ sudo apt-cache policy evolution
[sudo] password for jclemens:
evolution:
  Installed: 2.23.6-0ubuntu1
  Candidate: 2.23.6-0ubuntu1
  Version table:
 *** 2.23.6-0ubuntu1 0
        500 http://us.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

$ sudo apt-cache policy xserver-xorg
xserver-xorg:
  Installed: 1:7.4~0ubuntu2
  Candidate: 1:7.4~0ubuntu2
  Version table:
 *** 1:7.4~0ubuntu2 0
        500 http://us.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

$ sudo apt-cache policy libgtk2.0-0
libgtk2.0-0:
  Installed: 2.13.6-0ubuntu1
  Candidate: 2.13.6-0ubuntu1
  Version table:
 *** 2.13.6-0ubuntu1 0
        500 http://us.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status