Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
We are going to check it. It must be an issue from a Strict mode of some versions of PHP. You could config your server to avoid strict messages; although the change you have done will work perfectly.