Mandatory update to v18.104.22.168, source code now posted to github – please upgrade.
• Min TX fee within the QT client is now properly enforced at all levels
• TX fee message has been updated
New difficulty scaling algorithm has been put into place: The same algorithm that PPCoin uses; exponential easing towards the target spacing time. The original algorithm had a serious bug that showed itself earlier tonight and caused the chain to fork. This hard fork is to resolve that issue.