When I click on the "Publish at" fields, they have started disappearing. The date and time fields flash for a second, then vanish, leaving only the punctuation. This has been happening for a few weeks. I have used this feature many times in the past without problems, so I'm familiar with how it works.
My theme is Contempt. I have changed nothing in my blog settings recently.
I am also having a problem with my font size being changed to "medium" in HTML when it has always been "small." I think these 2 issues started at about the same time.
Blog url: http://catsworking.wordpress.com