After midnight on Saturday, we will bring down Listible for a brief moment to complete the upgrade of the symfony framework. The code has been migrated from older to new API in our test environment, so the remaining steps are to move across the changes from our svn branch back to trunk, upgrade the symfony framework in the production server, and finally checkout the new code. It should not take more than 1 hour. We will update this post if anything odd comes up.

UPDATE (1:45am EST): Migration is started.
UPDATE (1:55am EST): Migration is completed. The service has been resumed.