Base restrictions have been in affect on free hosting for several years now. What they did was prevent a php file from accessing any other files (or data) outside of the folder it was in. So for example,
http://demo.t35.com/index.php could access
http://demo.t35.com/data.txt, but not
http://demo.t35.com/test/data.txt. The original thought behind the restrictions was to improve security and prevent some hacks members were using to access other members files.
Luckily, we have spent the last few months re-designing the backend security system and are happy to announce that the restrictions have been removed. The biggest impact will come to members who wanted to host more complicated php scripts with us in the past and couldn't. This includes but isn't limited to forum's like phpBB, photo album scripts, blogs, etc.. So if you tried installing something in the past that didn't work, or want to try a new script, the restrictions are now permanently off and you should be allowed to do so.