"Outdated form" error message when trying to reply

Floyd, just tried to post a question to a new entry from today (Cinnamon Swirl with Bourbon-Soaked Raisins).  Got this:  The form has become outdated. Copy any unsaved work in the form below and then reload this page."  I noticed the post was normal size (2-column page) when I was typing, but when I hit Save it changed to full-page size (as with printer-friendly), and gave me the error message.  

Went back to Home, clicked on the Raisin Bread post to try again, with the same result.  Thanks!