I use Chrome to read Bimmerpost on my iPad. The menu icon at the top left corner of any forum page is not opening the forum selection menu ever since I upgraded to iOS 8. I have to go back to the Bimmerpost home page to select a forum to read.
I also have the issue when I use Safari.
I noticed sports.yahoo.com has the same type menu and it works OK in both browsers.
So I think it must be a problem with the forum web page.