If you are stuck in saving polls then the following might solve your problem.
Open configuration.php in Joomla root directory and change live_site to:
(these are two single quotes!!)
Make sure not to add a BOM(
en.wikipedia.org/wiki/Byte_order_mark) to that file. I recommend using Notepad++ for editing that file! (
notepad-plus-plus.org/download/)
BUT be aware that this might (not necessarily) break sh404sef. This component recommends to set the live_site but it also works if PHP can determine by itself which is the case 99%.