The message on Delfi.lt indicates that Slovakia is re-starting the nuclear reactors that were shut down as a part of the accession agreement with the EU. This is a tough situation for the EU and a test case for Lithuania. In this case - Slovakia, not Lithuania, blinked first.
An interesting parallel between Lithuania and Slovakia was related to the adoption of the common European currency. Slovakia uses Euro since January 1, 2009 and Lithuania was not allowed to make the switch because of a small (fraction of a percentage point, 0.17% if memory serves me right) variation from the "official" inflation rate criteria.
What will the EU's reaction be?