The map has been updated on a different server to a new version which has new endings and features, and also appears to fix many of the bugs plaguing v6, including the crash which can occur in the boss fight ending.
Here's the link: dropbox.com/s/l4dwucjxcpnadrv/dr_iceworld_fix_v9.bsp.bz2?dl=0
Here's the link: dropbox.com/s/l4dwucjxcpnadrv/dr_iceworld_fix_v9.bsp.bz2?dl=0