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I'm having the same problem as above - I tried it as an iframe, as a teAsked by TheMasses on October 10, 2012 at 04:14 PM
I'm having the same problem as above - I tried it as an iframe, as a text and as a link... all just gave me a little box
This is a re-post of a comment on Adding a form to Tumblr
Have you tried the solution given on this thread? Let us know your Tumblr page for us to check and give you a solution.