Embedded fonts and hidden text



I've just discovered that any font used in hidden text only isn't embedded. Has anyone else found this?

My hidden text includes Times New Roman italic. This text becomes visible on the preprint event. TNR italic isn't used for any non-hidden text. If the user fills out the form and prints it, fonts are perfect. However, if the user fills out the form and saves it, TNR italic isn't embedded in the form. Later when the user opens the form to print, the previously hidden text actually prints in Arial!