Wiki confusion on Overlays, needs a clear up [closed]

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I've tried installing turtlebot in my workspace, and I got the same info in Wiki about rosws and roslocate (from fuerte/Installation/Overlays), I came to know from the previous question that roslocate is made for groovy and my version is fuerte. Is this a bug, because I'm getting errors while updating the workspace. Please help. Is this going to be a problem when running turtlebot?

>  rosws set turtlebot --hg https://kforge.ros.org/turtlebot/turtlebot

     Change details of element (Use --merge-keep or --merge-replace to change):
  turtlebot     specified uri: https://github.com/turtlebot/turtlebot.git -> https://kforge.ros.org/turtlebot/turtlebot;    scmtype: git -> hg;

Continue: (y)es, (n)o: y
Overwriting /home/kishore/fuerte_workspace/.rosinstall
Config changed, remember to run 'rosws update turtlebot' to update the folder from hg
kishore@kishore-HP-G62-Notebook-PC:~$ rosws update turtlebot
Prepare updating https://kforge.ros.org/turtlebot/turtlebot (version groovy) to /home/kishore/fuerte_workspace/turtlebot
Failed to detect hg presence at /home/kishore/fuerte_workspace/turtlebot.
  (d)elete and replace, (a)bort, (b)ackup and replace, (s)kip: d
[turtlebot] Fetching https://kforge.ros.org/turtlebot/turtlebot (version groovy) to /home/kishore/fuerte_workspace/turtlebot
requesting all changes
adding changesets
adding manifests
adding file changes
added 365 changesets with 613 changes to 178 files (+4 heads)
updating to branch default
97 files updated, 0 files merged, 0 files removed, 0 files unresolved
abort: unknown revision 'groovy'!
Exception caught during install: Error processing 'turtlebot' : [turtlebot] Checkout of https://kforge.ros.org/turtlebot/turtlebot version groovy into /home/kishore/fuerte_workspace/turtlebot failed.

ERROR in config: Error processing 'turtlebot' : [turtlebot] Checkout of https://kforge.ros.org/turtlebot/turtlebot version groovy into /home/kishore/fuerte_workspace/turtlebot failed.