Elliot informs me comments have not been showing up in the comboxes, though they do reach him by email.
My suggestion to anyone who wants to leave comments is either
a) to write short comments around 500 words each, which should go through without a hitch, or
b) to post your comment and, if you see an error message, just go "Back" on the window to refresh it. The comment should be there.
The error message seems to be as much a lie as the cake!
That is all. As you were.