Same here. Although one post DID go through right away (and I will admit, I cheered a little) but I can't remember if I was editing a post or something.
I was getting it since Friday or so until last night on my new laptop (I thought it was something on the new computer that was doing it)- and I never got it before. This morning (Tuesday), I am on a different computer and it is not doing it- either this computer does not trigger it, or I got a different server, or you have it fixed.
UPDATE- just did it to me again, here on the other computer, Dang.
I just hit the back history button (right click on the back arrow in Firefox) and go on. Everything seems to be posting OK.
Oh, I just found this thread. I'm so glad to hear that this isn't my computer. I just got a new one a few months back and the last thing I wanted was to think my computer was starting to wig out...