One problem: if I go to, for example, https://tex.stackexchange.com/questions#tab=relevant before choosing any tabs on that site, it gives me an error message directing me to the URL http://stackoverflow.com/users/1189/#tab=stacked%20odds.
That is, it tries to send me to the Stacked Odds tab of my tex.SE user page, but it uses the domain name for SO instead of the one for tex.SE. (As it happens, this results in a 404 rather than giving me some error about there being no such tab or not being able to mess with other users options, but I assume that this just means user 1189 was deleted from SO due to inactivity.)
