I was reading a delightful Shane Nickerson post today (link over to the right onto Nickerblog - still figuring this all out on this computer!) and decided to make a comment. It posted twice.
The same thing happened to me a few days ago on his blog. Left a comment about Iron Maiden, and it posted twice. Apologized. The apology posted twice.
When it happened today, someone commented on my double comment. I COULD NOT RESPOND FOR FEAR OF LEAVING ANOTHER DOUBLE COMMENT.