The client mode is implemented wrong.

See http://firstforge.wpi.edu/sf/go/artf1594?nav=1&_pagenum=1&returnUrlKey=1358980727981
Prevent crash when a value isn't in the table

- If you call GetTable(), then GetNumber()/etc... when the table is
  cleared this will crash. Double check to see if there is a value in the
  table first