Facebook has updated their Cover Photo policy to be more specific and announced that on Facebook Cover Photos and Facebook ads or sponsored stories text is limited to 20% of the image area which also includes text within a logo.
Here is an easy way to use Fotoflexer (Fotoflexer.com) to see if your image is breaking the rules.
As of January 15th, 2013 the 20% policy for text on Cover Photos and Facebook ads will take effect.
Here are some examples of Facebook Cover Photos and Facebook ads that would probably break the 20 percent text rule.
To read more about it, visit my blog post about the new Facebook 20% text policy.
http://wp.me/p2c42f-F5
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