Possible Regression bug in 8.5.1 "Cannot save bitmap to disk" when saving document with rich text field in subform

I have a form “Memo” in a mail-in database which contains a computed subform. The form is not a copy of the Lotus Mail file memo - it is my own form with the name “memo”.

The computed subform computes to different subform depending on whether the user has an [Admin] role or not. If the user has the role the subform contains the Rich Text Field “Body” which is editable. If the user does not have the role, the subform contains the Rich Text Field “Body” which computes to itself. This is to allow only Admins to edit the content of the rich text field.

This is the way recommended in IBM technotes to handle this situation as hide-whens mess up the rich text content (see Unexpected behavior with hidden Notes Rich Text Fields 1099682).

As an [Admin] user if I open the document and click on a button that updates a field (not the rich text one) and then “Saves” the document, I get the error “Cannot save bitmap to disk”. I do not get this error if I place the Body field directly on the form (either as editable or as computed).

This doesn’t happen for all emails. The email in question did have hyperlinks and other possible HTML in it.

Found this link to a previous error that seemed to fit the bill:

Error: ‘Cannot save bitmap to disk’ when attempting to save HTML

http://www-01.ibm.com/support/docview.wss?rs=899&uid=swg21156103

According to this it was fixed in 6.5.5. Is it back again???