I have exactly the same problem, with the added complication that I am using a theme from Clickbump – and this plugin hides the Clickbank icon in the WP dashboard, so that it cannot be accessed/modified.
Deactivating the plugin restores the icon to the WP dashboard, so there is little doubt where the problem lies.
I’m using the latest version of the plugin 3.4.6 – which I have now deactivated.
