I updated my site to WP 3.2 and now get the endless spinning arrow on submit (using contact form 7, V2.4.5) - but the email does get sent. Of course, no one using my form will know that. :)
I know that the FAQ says the spinning arrow problem is often due to theme or plugin conflict, but before I had to back up all the little changes I've made I just wanted to see if anyone else is having an issue since upgrading wordpress. :P
Thanks!
PS - The theme is Spring Loaded 0.9.42-wpcom by the 449.