Beginning about a week ago I started randomly losing remembered logins. Sites I have been visiting for years without having to constantly enter username and login are now requiring it. I say randomly because I may be good for a couple days and then need to login again. It has even happened without logging out of the computer or the site. This site is one. One is TVGuide.com which is losing everything. Even when I sign back in it has forgotten my location and channel preferences. Any ideas what could have changed?