Hello gjr,
I'm using Zenphoto version 1.3.1 [5791] (Official Build)
Current gallery theme: zpFocus13.

I am having a little trouble finding a Validation Output Error on my news and news/category pages.
This is the error according to WC3 Markup Validation Service:

Line 299, Column 5: end tag for "ul" which is not finished

I'm guessing it is somewhere in the theme functions.php. I have looked line by line at that page, but I'm still learning the functions of php code and can't seem to figure it out.
I was hoping you or someone could assist me with this. You can see the news page at: http://www.vintage-electronics-ads.com/news
Thank-you!