MS Access not rendering form buttons properly after update

We have an Access database with forms. On the forms there are buttons that have a small bitmap image and text.

After the latest Office update, the buttons are blank. If you edit the button, and delete the bitmap, the text re-appears. But we don't want to edit dozens of buttons, and don't really want to lose the images as the user base is used to them.

This is definitely related to the update:

* If you take the same Access app to another PC where Offices not yet updated, the buttons display correctly.

* If you take the same Access app to another PC where Offices **has** been updated, the buttons are broken.

* The same behaviour is seen with different users.

Has anyone seen similar behaviour? If so, have you found a fix?