I may have just shot myself in the foot, but I decided to go ahead and
upgrade my wife's machine. It was running stable (lenny atm) and I
wanted to get it to testing. Its running trinity as well.

So I updated the apt-conf to

APT::Default-Release "testing";

(My base sources.list includes links for all three releases), updated
the trinity list from the lenny one to the squeeze one (the ppa
format), and I ran aptitude update; aptitude full-upgrade.

Things went well for about 30 minutes, then crashed. Now I am getting

[root@galaxy archives]# dpkg --configure -a
Setting up menu (2.1.41) ...
update-menus: symbol lookup error: /usr/lib/libstdc++.so.6: undefined
symbol: _ZNSt8messagesIcE2idE, version GLIBCXX_3.4
dpkg: error processing menu (--configure):
 subprocess post-installation script returned error exit status 127
Setting up python2.6 (2.6.6-8+b1) ...
update-menus: symbol lookup error: /usr/lib/libstdc++.so.6: undefined
symbol: _ZNSt8messagesIcE2idE, version GLIBCXX_3.4
dpkg: error processing python2.6 (--configure):
 subprocess post-installation script returned error exit status 127
dpkg: dependency problems prevent configuration of libpython2.6:
 libpython2.6 depends on python2.6 (= 2.6.6-8+b1); however:
  Package python2.6 is not configured yet.
dpkg: error processing libpython2.6 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 menu
 python2.6
 libpython2.6

and I can't get past the undefined symbol. Can anyone suggest what I
need to get this done? Especially since I didn't warn my wife what I
was doing?

Thanks,
--b