I have the same problem as skippywp but I'm a total newb. Can someone help explain to me how I am supposed to fix this? People are submitting to us through our website but get the spinning arrow forever on both our submissions page and our contact us page. I get the email but they don't get the information that it was successful and therefore send it 50 times to us. I'm on godaddy. I have been using this plugin for years with no problems. Updated plugin and wordpress. 3.5.1 and plugin 3.4.
Thanks!