If Rolzup is experiencing the same change that I am, we are talking about the front page where you can see the news items for the day. There used to be a box in the upper left corner that allowed one to log in. It has vanished.
For the record, it is no big deal to me. If I want to log in, I can still access the box in the upper right corner on any page within the forums. Or, as I did in this case, just hit the reply button and wait for the site to prompt me to log in. Both of those options are completely functional for me - in spite of the front page box in the upper left hand corner disappearing.
No big deal from my perspective, but I don't speak for others, of course.