Re: error produced with cl-http by Mozilla browsers

Perhaps you would be better off using the :computed-form export type
and using URL as the POST argument to with-fillout-form. This is
designed for your application.

Clearly, you are getting the post method back to the computed URL.

This is doubtless due to a browser bug when told to post to
a relative URL.

Your post target should be fully specified absolute URL, if you don't want to be
at the mercy of broken browsers. Or you better supply the base url
against which to merge.....