In case you tried to report some bug or issue you might have noticed: we currently have authentication issues with the trac system we are using for that.
These will be solved in the next couple of days - we'll keep you updated.
These issues are now resolved. You should be able to login with your Support Forums account, no need to register a new account. Please keep in mind that only authentication is exchanged. You will still need to enter your email address in preferences in trac if you want to get notifications about changes to tickets or alike.