Now let me understand your problem. Are you not able to upload files after the last update?
We are aware of a problem, but is a bit unlikely to occur. If you are using an ISO database, and try to upload a file named with UTF-8 characters, the PHP will not allow uploading this file.
It also occurs when you try to insert files named with some characters restricted by the operating system itself. For example, in Windows you can not create file with some symbols \ / : * " < > and |, but Linux enables you to create them without problem.