UPDATE 7/16/14
There was a problem with the checkpoint update from yesterday, the issue is now resolve but you will need to pull the updated code and recompile your daemon if you are using the code from yesterday.
=====> Mandatory Update <=====
This is needed in order to stop future check point to old warnings.
Please download the New Windows/Linux QT and re-download the block chain.
Please find updated Links on OP
thank you Lima