Hi guys,
I used to have this problem where after I type log in at forum.sammyboy.com and tick the 'Remember Me' box, it takes me to a screen that goes something like "Thank you for logging in, nuclearkid". Then the next screen is the original forum.sammyboy.com but unlogged in. I used to do it a few times and damn irritating. Sounds like what thread starter has described.
But I use the same method bro ba_bu_1975 uses, that is, refreshing it. You can simply keep refreshing the browser until its logged in. Proven and tested!