In my case I tried to install this version using my laptop, under Firefox web browser and could not login or sometimes even finish the installation due to cookies problems.
I check Tools>Options>Privacy>Show Cookies… and my site was not there.
I then tried to add the site manually and the problem did not solved.
I deleted the /forum/ folder and the bb_ tables from the MySQL database and uploaded the bbForum again. This time I used my desktop and checked the cookies first. My site’s cookies were registered and the installation went smooth and the forum is operational.
Hopefully this would help somebody.