This is what a member of the Admin Team had to say on the official EA Forums:
Due to some last minute changes the release of the 1.4 patch has been delayed.
We do not anticipate this delay being a lengthy one, however we do not have a fixed date for release at this time.
We will update you as soon as there is further information.
Apologies to those who were expecting the patch today, however in order for this patch to succeed in the way it is intended a little extra time is being taken to ensure it is right.
We understand that this is going to cause a significant amount of aggravation, however it is worth ensuring that the patch actually resolves as many issues as possible. So some additional time is being taken to ensure that this is the case.
This last thing we want is a repeat of the 1.3 patch.
Although the patch was announced to be released today (by EA Spain), it seems a small bug has been found and needs to be fixed before patch release. The release of patch 1.4 has been postponed 24 hours in order to allow more testing and the fix of this small bug.