Turtlebot roswtf warnings [closed]

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Running electric ros updated (4/23/12) on oneiric generates this after turtlebot_bringup minimal.launch: Is this ok? Anything I need to fix? keyboard teleop drives it OK.

Found 2 warning(s).
Warnings are things that may be just fine, but are sometimes at fault

WARNING The following node subscriptions are unconnected:
 * /turtlebot_node:
   * /cmd_vel

WARNING The following nodes are unexpectedly connected:
 * /turtlebot_laptop_battery->/rosout (/rosout)
 * /diagnostic_aggregator->/rosout (/rosout)
 * /turtlebot_node->/rosout (/rosout)

Found 5 error(s).

ERROR Communication with [/robot_state_publisher] raised an error: 
ERROR Communication with [/master_sync_Herschel_18607_1106643710] raised an error: 
ERROR Communication with [/robot_pose_ekf] raised an error: 
ERROR Communication with [/rosout] raised an error: 
ERROR Communication with [/app_manager] raised an error: