Thank for your reply. As the chache mecanism, it was the firs step to check, I use WP Super Cache – but now it’s disabled.
As my agent here it is:
Your user agent is:
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; .NET4.0C)
the funny part is that is Internet Explore 8, not Firefox 4 identified by the agent. http://img828.imageshack.us/img828/405/ieidentifiedasfirefox4.png
