Same problem here. It occurd after updating the following packages:
updates: ruby1.8 (1.8.7.249-2, 1.8.7.249-2ubuntu0.1) ruby1.8-dev (1.8.7.249-2, 1.8.7.249-2ubuntu0.1), libruby1.8 (1.8.7.249-2, 1.8.7.249-2ubuntu0.1) libreadline-ruby1.8 (1.8.7.249-2, 1.8.7.249-2ubuntu0.1), libopenssl-ruby1.8 (1.8.7.249-2, 1.8.7.249-2ubuntu0.1)
Same problem here.
It occurd after updating the following packages:
updates: 2ubuntu0. 1) 2ubuntu0. 1), 2ubuntu0. 1) 2ubuntu0. 1), 2ubuntu0. 1)
ruby1.8 (1.8.7.249-2, 1.8.7.249-
ruby1.8-dev (1.8.7.249-2, 1.8.7.249-
libruby1.8 (1.8.7.249-2, 1.8.7.249-
libreadline-ruby1.8 (1.8.7.249-2, 1.8.7.249-
libopenssl-ruby1.8 (1.8.7.249-2, 1.8.7.249-