I visited pclinuxos.com under pclinuxos,this is a pure English system and I got wrong page,so do you still think it is a character encoding problem?could you give me some suggestions to do an experiment ?
Sorry if you've already tried it, but boot into the livecd (it won't harm your installed system) connect it to the internet (you will probably have to set up the connection in "Configure your computer"), and try to access the forum from there.
You say it's a plain English machine, but the Windows in your screenshot wasn't plain English, and I wonder whether that might have affected something. Then again, possibly somewhere online your character set might be converted. You can't easily check for that latter case, but you can at least check your machine itself.
I realise Neal and O-P would have done something if they'd found anything, but I'm not suggesting it's anything obvious in the forum configuration. Obviously, they've looked. Obviously it's not something they have access to, or they would have found it. I don't know enough about the hosting arrangements to comment further than that.
What I keep coming back to are two facts:
1. Tracert certainly gets into the US, where it is unlikely anyone could misroot traffic without being noticed
2. The server that responds runs the same (unusual?) combination of software as the pclos forum server.
Either the person hijacking the IP address has taken the trouble to match the software, but not attempted to mimic the site, or you are reaching the right server, but it doesn't understand your request.
We have no way of knowing how common this problem is. I suspect you have been more persistent than most in finding a way to this forum to tell us. There could be many others who just gave up, for all we know.
I'm not trying to tread on anyone's toes here. I'm just trying to come up with a theory that fits the facts. I don't claim to have any special knowledge. Maybe there is another explanation none of us can see.