Has anyone else created a thread, and upon posting it, seen only "undefined" in the body of the first post?

I've had it happen twice now. First time, I had copied most of it luckily, as I often do with longer posts, but the second time, I did not, and am now going to have to repost. Zinga, you have any idea what could be the problem?

Edit: I also noticed that the last time it happened, when I tried clicking on the video icon, instead of typing out the tags, it would not select, and I ended up having to just go with tags anyways. Perhaps coincidence?