Yes I know there is plenty of plugins but I couldn´t find any which behaved exactly like I wanted it to.
But I managed now with a custom code: http://pastebin.com/3Wj8e8aH
& a seperate plugin for handling the redirect to blog page upon login (Peter’s Login Redirect).
I´m also experiencing this issue. I´m admin and the site I´m working on is still in development so I dont know if it only affects me or all users. Will check it out!
