Got mine Friday as well.
Went to load it into my utility knife, and discovered that the plastic innards of my utility knife are shot... the part the the sharp edge of the blade rests on is worn away, allowing the blade to fall inside the handle, which makes the thing stick and lock up while trying to deploy it.
Looks like a new utility knife is on the horizon. (actually, I'd rather find an OLD, all-metal utility knife!)
-Brad