Fix some bad thunk de-duping

Hello @andrew3886, 

Please review the following commits I made in branch 'nick-2thunks-2furious'.

8e07f0b846a8440874030bce75cb30da0ff63852 (2013-11-04 13:51:22 -0500)
Fix some bad thunk de-duping

Check list:


R=@andrew3886