The gallery works great in Explorer (after the "Allow Blocked Content?" message), but in Chrome when I click on a thumbnail the image simply opens in a new page. Am I missing a line of code somewhere to make Chrome open the images correctly?

Hello,
Please provide a link to your page, where we can check this issue.

Thank you for your attention Teodor, but I figured it out. The pages must be on a remote server - local will only open the image on a new page. Rather frustrating for testing, but actually makes sense.

BTW - the link is www.khaggblom.com/galleries.html