I was able to reproduce this behavior. Have you tried to catch the backgrounded "sudo synaptic" by entering "fg" (without the quotes)? This should call up the hidden password-dialog and you should be able to continue working.
I was able to reproduce this behavior.
Have you tried to catch the backgrounded "sudo synaptic" by entering "fg" (without the quotes)? This should call up the hidden password-dialog and you should be able to continue working.