We're back!
Recently we've got this security alert in English:
Security Alert
The file you are uploading was rejected by the server.
It probably contents viruses or trojans that can damage your website
Do not attempt to upload it again as your IP address may be blocked.
and the same in Chinese: 安全警报
该文件是你想上传服务器拒绝。
也许该文件包含病毒或木马可能会损坏您的网站。
不要试图再次上传您的IP地址可能被阻止。
It showed up every time, when someone tried to post a new answer, to open a new thread, to edit his/her profile...And then we contacted to our hosting. They were so nice to answer soon and to fix the problem. Thank them very much!
We're sorry for the inconvenience, dear forum members, users, readers, friends!