Very interesting.
The same happened to me on a Norwegian professional site wednesday. I have contacted the company. They are looking at the problem.
It
seems to be browser independent.
Can the reason be software that you have downloaded?
I now have a policy of not downloading any (aside for what is needed to surf the web) software on my computer unless it is bought.
General advice:
- Be careful with third party toolbars.
- Be careful with plugins.
- Use a browser you rely on.
- Don't surf the web as an administrator.