Comment on Technical Support by SEO Dave.

WordPress Technical Support That’s highly unlikely to be a theme error. A little research for that error suggests you are using an out of date plugin that has a fault

See “Version 1.5 (20 January, 2012)” info.

For future reference it’s difficult to track down errors/bugs without being able to at least see the URL to the site with the issue. You are lucky I found the above information with so little to go on.