At the beginning of usage, I registered an account and started to test the function of the site. When I try to upload a picture, I can not choose the uploader. And I also tried to change the uploader for video and sound, the same problems happened. When I choose other upload method, such as Flash, the page was displayed as attachment, and the uploader didn't change successfully.
After studying the issue, I find out that the problem is connected with my account name, when I use Russian Characters as account name, the same problem appears; when I use English Characters as account name, everything goes fine.The site was built for users of different languages(besides English users), the problem I described will cause big problem for site operation. I am not a free user, and hope your support team can help me to fix the problem. Thanks!