Media for Diversion to non-responding, suspicious sites?

Diversion to non-responding, suspicious sites?

Hi, It occurs to me that in many cases when I want to go to a site, the chosen URL at the top of FF's window doesn't correspond to the one that shows up at the left hand bottom corner of the window. I suspect that my browser is diverted to an advertising site, or so, while I'm wanting another one. The next situation is actual at the moment: I was searching (Google) for currency converters. I clicked the first hit, showing the URL

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I landed there alright, but at the bottom line was shown - and that didn't change anymore - "Looking for host2.adhese.be...". This is funny, but I continued: I choose Euro against New-Zealand Dollar and clicked the button "Bereken de wisselkoers" (Dutch for "Calculate valuta"). I landed, according to the top line URL at

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(seems OK), but the bottom line showed "Searching server a.tribalfusion.com...", which seems wrong to my opinion. This searching didn't come to an end and I didn't get the answer to my calculation request.

I did the same steps with Internet Explorer, I didn't get an answer either, the only difference was that there at the bottom line could be read: "Opening page convert.cgi at

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", which looks well, but I suspect the same problem shows up (maybe I have other display options set in IE than in FF), because nothing happened, there was no answer to the requested calculation.

I noticed this behaviour at many sites lately. I mailed to various webmasters informing about this problem with their sites, and asking whether it might be my PC that is in err, or whether their site could be hacked. I didn't get any answer to my mails, but the next day or so the problem didn't occur any more. So, I suspect hacking is the matter, but I'm not sure.

My questions now are:

Is there something wrong in my PC?
If so, how can I correct this problem?
If not, does this mean that the sites I am looking at are indeed hacked or something the like?

Could anybody answer these questions, and, if I can do something to avoid this annoying behaviour, how can I? Should I mail to all those webmasters, if 3 is true, like I did before?

TIA, Oriolus