There is a problem on some proxy servers and web connections that make it look like you are logged of and you cant download or do anything else on the site.
Check "remember me" when you log in solves the problem.
It is a web problem so we can not do much about it. Sorry
Unfortunatly there is a bug in the download software that makes it impossible to download sometimes. We do not know why. So in the near future we need to do logins/for downloads.
We do not like it but now we can open the forum to, so something good comes out of it.
After some testing we are now moving away from MySQL to MariaDB. Work as good and MariaDB now comes with OpenSUSE. The developer grid could be down for some time during the transfer.