Careful Gregory, you've hit a hot-button issue: you have dared to refer to exceptions as errors!

For the record, I find this pedanticism misplaced, as the line between the two is rather blurry. Nonetheless, for control-monad-failure and attempt, we purposely refer to the whole slew of "things not succeeding" as "failure"s. Not to be confused with public enemy number 2 of Haskell users: the "fail" function.

</tongue-in-cheek>

Michael