Error

Every time the admin page changes or refreshes this error is displayed:

AGCA – ADMIN ERROR: ReferenceError / isWPHigherOrEqualThan is not defined

I click OK and continue.

How do I fix it?

Details:
Magazine Basic 2.7.7
AG Custom Admin
All in One SEO Pack
DFD Zazzle Store
Fast Secure Contact Form
Google+ for Page
Google XML Sitemaps
Quick Cache
Quick Subscribe
Simple Social Buttons
Sociable for WordPress 3.0
Subscribe2
TentBlogger Social Widget
WP Minify
WP SlimStat
WP SlimStat Dashboard Widgets
WPtouch
Zazzle Widget

Thanks in advance.

Phil