The update failed for me as well. So I uninstalled, reboot, and now cannot install Torchlight. I get the error code:

Unpacking torchlight (from .../torchlight_1.0+2012+09+26-0ubuntu1_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/torchlight_1.0+2012+09+26-0ubuntu1_amd64.deb (--unpack):
 trying to overwrite '/usr/share/icons/hicolor/48x48/apps/torchlight.png', which is also in package torchlight-bin:i386 1.0+2012+09+18a-0ubuntu1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Processing triggers for hicolor-icon-theme ...
Errors were encountered while processing:
Error in function: 
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
And since I'm addicted to this game, there are some major withdraw issues too.

Any ideas on how to get Torchlight back? Or should I wait for a fix? Thanks!