oh well, I really need to study.
But I came to that conclusion because everytime I have problems with web pages it's because of javascripts. And this happens both with firefox and kazehakase (more with firefox, really, which crashes often). I never had this problems when my old notebook still worked (i386). But probably from what you say I'm using a lot of javascripts without noticing it, and the problem is another alltogether.
Now with phpPgAdmin I can login, and when I login I get again the login page but this time in all the three frames, if I login in the left one, I get the tree of my database, clicking on one of the databases brings me back to the login prompt (in the small frame), an guess what, the tree is in javascript.
So, I guess I'm cursed with something else...