Latest Kraken update says that:<p>> We are still working to track down an elusive bug which is holding up launch. This bug did not appear in our many weeks of testing and only emerged in the production environment. Unfortunately, it is not consistently reproducible and we cannot launch until this issue is resolved.<p>Sounds pretty realistic to me. During my 8+ years of programming, I had a lot of pain and sleepless nights trying to catch elusive bugs which can be reproduced only in production servers and only sometimes. Many times, my clueless managers got nervous and demanded estimated time from me. Unfortunately, it's impossible to give realistic estimations. It could take hours, days or weeks. Also, searching for such bugs doesn't scale well. It means if you have 5 devs looking for elusive bug, it doesn't mean they will find a bug 5 times faster.