membership blocking images on pages

Good day,

I've got a new problem I can't figure out ... Membership is blocking all images from view on pages for free users and paid subscribers. Oddly, the administrator (me can see all images. Any ideas as to what is likely causing this problem?

The images affected are those I added directly to the page content in the WP editor. Other images (features, box sets) not in the page template are not affected. The images are all in .gif format.

The site is relatively new with a Membership setup from scratch. Just added the levels, subscriptions, and payment gateway (express-single payment) - of which appear in good order in test run. When I enabled the Membership plugin all the images disappeared for free and paid users.

Any ideas?

Thank you,
BDA4