Comment 23 for bug 346083

with the new packages the problem not occours, anyway the problem I had was with AuthenTec AES2501:
1) swipe with a finger not configured -> the swipe fails
2) you will asked for another swipe
3) swipe again with the correct finger -> nothing happens
4) the only way out is to wait the timeout and enter the password

with new library

3) swipe again with the correct finger -> authenticated
or
3) swipe again with another finger -> you will asked for another swipe (max 3 attempts)

for synaptic and some other administrative apps look at
https://bugs.launchpad.net/ubuntu/+source/gksu/+bug/86843
https://bugs.launchpad.net/ubuntu/+source/pam-fprint/+bug/347778

with keyring, as you said the problem is not trivial.

thanks for the fixes!