Whenever I try to post something to Tumblr (audio/text/photo or reblog), NoScript seems to be adding a URL to the caption box. Tumblr is allowed on NoScript (the odd URL disappears if I forbid Tumblr on NoScript, but eventually, Tumblr tells me to turn on Javascript).

I can just delete the URL, and it doesn't affect anything, but I find it annoying that it's started appearing all of a sudden. Is this a problem with the new version (I updated within the last couple of days), or a problem on my/Tumblr's end?