Issue with back button not returning

[rwoody]

I created a new page to hold a video to demonstrate a customer's upcoming product using a small flash module. That works perfectly, but the back button on the video's page returns you to the home page, not the page previously visited.

I've double checked and the back button code is correct, but again, it will only return to the index page.

<div class="buttonRow back"><?php echo zen_back_link() . zen_image_button(BUTTON_IMAGE_BACK, BUTTON_BACK_ALT) . '</a>'; ?></div>

You can see the issue by clicking here

Any suggestions? All my other back buttons work fine.