There is an incompatibility with PHP 5.3. As
we announced in April our PHP 5.3 support is gradually phased out between May and August 2015. In fact we can barely test against PHP 5.3 any more. On top of that PHP 5.3 is obsolete since last year and you should really NOT use it if your objective is having a secure site.
The best solution is asking your host to upgrade your site to PHP 5.4 or later. Read the link I provided for more information.
We may release another version to restore PHP 5.3 compatibility of this feature but it's not in our immediate plans. PHP 5.3 compatibility is considered a very low priority issue since May 2013.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!