Ok, so I've been using 12.04 for a bit now, and the main bug that's been
hurting has been this:
p11-kit: couldn't load module:
/usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so:
/usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so: cannot open shared
object file: No such file or directory

Which happens when I open something in wine that wants to use said
library.  Tracked in launchpad bug link here:
https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/885492

If you are a wine user and plan on upgrading, watch that bug or you might
get bit like me.

-- 
James McPhee
jmcphe@gmail.com