Hi all, Sorry if this is known; I searched the achieves but nothing came up. I just noticed that one of the constructors for the data type ActionOnWindowClose, namely ContinueExectuion contains an incorrect spelling of execution as 'exectuion'. As shown here: http://haskell.org/ghc/docs/latest/html/libraries/GLUT/Graphics-UI-GLUT-Begi... My ghc-pkg reports version: GLUT-2.0 Dave,