Windows Vista build 5059 (vbl wcp avalon)

Windows Vista build 5059 (vbl_wcp_avalon) is a pre-Beta 1 build of Windows Vista. One screenshot was leaked and it shows this build on an HP 1902 with the Windows XP Olive Green Luna theme. If this is a real build, it might be the one of last builds of post-reset Longhorn to have the Luna theme from XP.