Since upgrading a few sites to Zen Cart 1.3.8a, I've noticed the additional images aren't showing correctly.

When you click a small additional image, it opens the original large image in the pop up window, not a resized large image from the bmz_cache folder.

Here is an example:
http://bangbangyourethread.com/index...&products_id=3

The main product image pops up an image from the bmz_cache folder; the additional images do not.

Here is a second example:
http://pushtheenvelope.net/index.php...roducts_id=104
http://pushtheenvelope.net/index.php...&products_id=2

I'm including two links here, because I've noticed that all images added before the upgrade work correctly, and all additional images added after the upgrade don't. So product ID #104 (first link) is displaying incorrect behavior, and #2 (second link) is working as it should.

Any ideas? Thanks in advance!