But if 2.6.18 is only supported why 2.6.24 is existed for proxmox ve? We can suppose that 2.6.24 and 2.6.27 is in similar development state "development, maintained".
Then question is how hard could be build 2.6.27 openvz kernel for proxmox ve. "Officially" for testing as option same as 2.6.24...