Comment on Clickbank WordPress Themes by SEO Dave.
You can probably track down the post at fault by loading the pages on the home page until you find one where the sidebars break.
If it’s what I think it is I had another customer with this issue. Basically some articles added by the Massive Passive Profits Plugin are not having the excerpts processed correctly and it breaks the excerpts which Talian (many themes) uses.
I suspected it was an RSS feed plugin doing something strange as it’s not Talian breaking an RSS feed excerpt (themes don’t interact with the feed URL).
I’d need to see the site to be sure. If you don’t want to post a URL here feel free to email me. Ideally I’d have links to a few of your sites you’ve setup the same for comparison.