Bug or new feature? - It's A Big Bug!

[SimPLsol at aol.com]

Ken, Eric,
     I have not moved to 2.6, and this would be enough reason not to do so. 
Does the following also fail in 2.6?

on mouseUp (or some other command)
     ask <string>
     if the result is "Cancel" then exit mouseUp (or whatever command)
     continueDoingStuff
end mouseUp

Thanks for the warning.
Paul Looney