i use two computers in the house both with the same software.my query lies with my browser of choice firefox 1.03.on the one when i have read a post on the webuser forum(or any other type of forum this also occurs in ebay) and return to the menu,that post turns blue indicating that i have indeed read it.on my other pc nothing happens with the change in colour. both pc's use xp pro and have the same spyware/av software/firewalls etc installed.is there any reason why this should happen.many thanks for any replies.