Hi,
I'm having what seem to be similar issues to some others in the forum. After upgrading to WP3.5, some of my forms are no longer visible in Chrome (v23.0.1271.97), Safari (v5.1.7). The form is present in the page source, but has inline CSS setting "display:none".
The form does appear as before in Firefox (17.0.1) and Internet Explorer (v9). The form in question is on this page: http://sptc2.the-graphics.net/about-sptc/membership/application-form/
(For comparison, here is the same from before upgrade to WP3.5: http://sptc.the-graphics.net/about-sptc/membership/application-form/
The affected forms appear to be those with conditional logic. Other forms, such as this one
http://sptc2.the-graphics.net/about-sptc/contact-us/ are not affected.
Hope you can track down the cause of the issue!
Thanks
Chris