piatkow - 1:38 pm on Nov 11, 2012 (gmt 0)
I once uploaded a site to the wrong domain... Didn't notice for days. It sort of confused google for a month or 2.
If you have multiple sites its easy enough to upload to the wrong location if you are in a hurry.
I once spent ages trying to work out why an update hadn't taken despite re-uploading several times. Finally I noticed that the default target domain in my FTP software had changed.