please be so kind and send us WordPress dashboard access privately thru the contact form which is on the right side at http://themeforest.net/user/muffingroup#contact and we will check what might be the reason. Please don’t forget to explain your issue in the messeage very clearly.
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please send us link to page where it does not work first so we can have a look on it.
They are currently set to no greyscale to undo the issue.
I can send you details to go into the backend and check it out.