Just reporting that when I view MP so that only the "Walt Disney World Resort Discussions" forum is showing - the borders and the shading of the sub-forums: Resort News and Current Events; Touring the Parks; Where to Stay.. etc. are "off". When I view all forums at the same time, or go directly to a sub-forum, the appearance of MP is normal.
Just checked and it happens when I view any Forum separately - but not when I view all the Forums at the same time, or just an individual sub-forum.
Hope I've explained this adequately - it has been happening for several days now. However, it affects only the appearance and I am still able to navigate MP with no problem.
Note: I thought at one time I saw a thread with a similar topic, but I can't seem to find it now. I think part of the problem/answer had to do with which theme color MP was viewed in, so in case this is a factor I use green.