Avoid to be easily the target of the HTTPS BREACH vulnerability.
In August 2013, a new Web Vulnerability has been released, in some words : "HTTPS can be hacked in 30 seconds".
If you're using the HTTPS (TSL or SSL) at any level (admin, front, event for 1 page) you HAVE to protect your site against this flaw now.
How ? Just install this free plugin!