I'm new to ZenPhoto, so I'm not sure if this is a bug or just something in my setup. Every time I edit a comment, when I click Save, I get the following error.

Fatal error: Call to undefined function snitize_numeric() in /home/vwchsite/public_html/sample/photos/zp-core/admin-comments.php on line 84

I have version 1.2.6

It is a typographical error. It is fixed in the nightly builds or you can simply change that line to say sanitize_numeric()

Got it. Thanks.