2 Attachments w/ Filenames causes form to become read-only

[donwhite]

I have a small table where 2 columns of 14 columns are attachment datatypes - named image1 and image2.
during form design i add image1.filename beneath image1.filedata and all is okay.
as soon as i enter another text box for image2.filename beneath image2.filedata, the form becomes an edit only form and data is no longer editable in form view mode.
if i delete the field from both the form canvas and the underlying query, the form returns to allow edit of form data.
any ideas? workaround?
i'm using windows7-64 and msaccess 2010 32bit.
thanks
Don