AJAX Scroller not showing all content items

I said everything that I could about it. I can't fix your server. Present your web host the link that returns 500 Error and tell them to fix it:
www.catchlight.com/dev/naturalgardener/m....php?m=84&d=prev&c=0
If you try www.catchlight.com/dev/naturalgardener/m...ller.php?m=84&d=prev it works, so the problem is in &c=0 in query string. It is some stupid security setting somewhere on the server that blocks it.

That helps.

Thanks,
Howard