YES! I did the same exact thing. Dropped the lens, only onto a floor, not carpet, and it came apart into two pieces just like this. Put it back together again and it worked for awhile. Then it wouldn't focus. Less than a year old so I sent it to Canon to have it repaired and they didn't really seem to mind that it had been dropped. Apparently these things do come apart pretty easily.
Oh the horror! I think Humpty Dumpty is dead. Lucky this is one of the cheapest lenses available. Still sucks though. Worth a try to put it back together. Or use it for the next SP challenge - submit this photo and title it "I tried" Hahhaaaahaaa. Just kidding. I'm such an ass. :)