Installation of 2.8.4 (fresh) not working properly, redirects gone to H….???

Yo!

I’m trying to install the wordpress 2.8.4 script on my server and well, it worked like a charm installing it, but something seems to be killing the redirects and/or the cookie-function on the blog… making me unable to login to the wp-admin section (i just get a blank page).

So here’s what I did in detail:

1) I downloaded wordpress 2.8.4 from www.ads-software.com
2) I created a database (MySQL)
3) I edited the wp-config-sample.php file and entered the logininfo and serverinfo for my database, hit ctrl+shift+S and saved it as ‘wp-config.php’ and uploaded the whole package to my subfolder at my host (I excluded the wp-config-sample.php-file from the upload)
4) I went to https://www.mydomain.com/subfolder/wp-admin/install.php and installed the blog without any errors.
5) I tried to login to the site with the given password, and the page just went blank.

Facts:
-I have firefox charset set to UTF-8, so I get a perfectly blank page, where in another case, I’d get some ” ???”-symbols instead, on a blank page.
-When typing the WRONG password, I recieve an error that the password/username is incorrect, and ALSO that the cookies are disfunctional in my browser (“Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.”).. wich is not correct, they are fully active and I’ve tried multiple browsers on multiple PC’s.
-I’ve tried to upack it all again and replacing by uploading a second time, even tried to change the hosting in wp-config.php back to “localhost”.. wich shut down the whole blog. Hence: not the issue.

I never had this problem before, only had database connection-problems before because that some files wasn’t re-writable or something (CHMOD)..

..so, could this be the case, that some files need extra permission? As of now, all my files has been CHMOD’ed to 755 to try if there were a diff, but there’s not.. and I hardly think they have to be set to 777 as I never had to do that before.

I see other people (not many) having the same issue as me, but the closest to the answer I’ve gotten just confuses me and I don’t get the logic in it (or how to extract accordingly):

I solved the problem.

Somehow, when I upzip the wordpres-2.8.4, it would ask me if I wanted to override some files... I thought this was strange because it was the first time I upzipped, but I said 'okay'.

This somehow affected the site installation when I uploaded the files to the server.

If this happens to you, try downloading the zip again, and extracting one folder at a time and then the rest into a new folder.

It worked fine after that.

):