We could not create any polls or vote on any after we installed 1.5.3.

PHP Version: 5.2.10
Web Server: Apache
Web Server to PHP interface: cgi-fcgi
Joomla! Version: Joomla! 1.5.15 Stable

We are also using a rocket theme that uses a lot of ajax. I also noticed that the polls did not work on my iphone either. I suspect it is and ajax problem. Let us know when it is fixed we would like to upgrade when it is stable. We already switched back and added your patch. Thanks for the great work.