First I would like to thank you for such a great program. I use it for our community website. But its been a few weeks now that we cannot view the pictures. It shows the album and thumbnails. When you click on the thumbnail it gives me this error:
Fatal error: Call to undefined function is_valid_video() in /home2/alongth5/public_html/Album/zp-core/template-functions.php on line 2628
Here is a link to one of the Albums:
http://www.alongthebayou.com/Album/index.php?album=Leo+Kerner+-+Veterans
Any help would be greatly appreciated.

Well, that is an interesting problem. There is no such function call at that line in the 1.2.8 version of template-functions.php. So somehow you must have got some files mixed from prior versions.

From the official download of 1.2.8, line 127 reads:
`if (isImageVideo()) { // Download, Protected View, and Unprotected access all allowed`

That is the current version of the code you are failing on.

Suggest you re-upload the release.