I have search the forum about this problem, but haven´t found any solution here.
When I finally, got everything upp and configed then I can´t login because: "Your browser does not accept cookies".
I do accept any cookie. I have tried Firefox and safari (I´m on a Mac) but its the same problem...
What to do?!

Bump. Is there not anyone that have a solution for this problem?

Double check that your browser is actually accepting cookies. Safari's default works fine for me.
If that still doesn't work, try actually looking to see if RoundCube has set a cookie or not.
In Safari, that's under Preferences... > Security > Show Cookies.

I have set Safari to accept all cookies.
When I go to the login page one cookie is set. But when I try to login I get the message that "Your browser does not accept cookies". And no new cookie is set.
I don´t get it, everything looking right.

I can't reproduce this in Safari at all.
I've tried setting it not to accept any cookies, clearing out my RoundCube cookies, and then attempting to log in, but I never get the message that "Your browser does not accept cookies" it just kicks me back to login.

Did you ever figure this out, jimavloi?

I'm seeing the same thing in a 0.1.1 install, but only when the webpage is served up on one of my virtual servers. On the virtual server I used to have it on, it worked fine. On a new one it punts with this error. I don't really know what the difference between the settings are on the two servers that might cause this cookie problem....

I also noticed that I get the following at the top of the installer pages if I go to them:

I haven't been to this page since I've just been upgrading RoundCube since I installed it manually a few version ago.

Hmmm... I also am failing this test in the installer:

magic_quotes_gpc: NOT OK(is '1', should be '0')

It looks like this is supposed to be set to 0 by the .htaccess file in the root roundcube folder on the webserver, but it's not taking on the virtual server with the issues.

Fixed the magic quote thing (moved to php5), but I'm still getting the same warning about headers already being close from the installer and still get the error about my browser not accepting cookies when trying to log in.

Okay, now I'm wondering if this is a Browser thing. I'm having the problem on a Firefox 2.0.0.12 Linux install. I do not see this problem on a Firefox 2.0.0.13 WinXP install. It might also be some strange cookie thing, as my Windows Firefox Install always deletes all cookies and such on exit.