We have an issue with a web form that becomes read only when published. When opened locally the form data is editable, once published the data is locked. The message "This field cannot be edited because the underlying field '*' is read-only" is displayed whenever we try to edit the field. Neither the form or the form fields are locked.
The form is a simple form based on a simple updateable query.
The issue is explained in this MS tech article. It's not a bug, it's a limitation of Access Services in a Web Browser.