I thought that I would just post this up to let anyone know that the Express Patch to help fix the ESXi 6.0 CBT issue has now been released and is available under the following KB numbers:
2137546 & 213&545
Summary of the fix is enclosed below:
This patch updates the esx-base VIB to resolve an issue that occurs when you run virtual machine backups which utilize Changed Block Tracking (CBT) in ESXi 6.0, the CBT API call QueryDiskChangedAreas() might return incorrect changed sectors that results in inconsistent incremental virtual machine backups. The issue occurs as the CBT fails to track changed blocks on the VMs having I/O during snapshot consolidation.