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After Upgrading to 1.8.1 I am unable to add, modify existing or use product custom options.
After I performed the 1.8.1 upgrade my site lost the ability to use custom options for my products. When I go into manage products am able to navigate to the custom options Tab on the left, but once I am there when I click the add new option button, nothing happens. When I go to a product that already has custom options set, they do not show any more either.