This (now deleted) SO question somehow ended up with 14 people voting to close and migrate it. For each extra vote, an extra copy of the question appeared to have been created on Meta (though they have now been cleaned up).
Now a similar problem has occurred on this Meta question where close votes are still somehow being cast.
This was supposedly fixed months ago, but it's clearly still a problem. I blame Jarrod and his goto
statement. =P
Screenshots:
alt text http://img683.imageshack.us/img683/1160/migrations2.png
alt text http://img696.imageshack.us/img696/8155/multiple1.png
Update This is now happening again: SO question and one of the migrations