/etc/screenrc contains default sitewide options, and then it looks like someone pasted a default user ~/.screenrc, redefining some options to other values. Mind you, it does work but it's kind of weird, especially when you edit the first vbell to off for instance, and it doesn't work because it set to on a second time lower in the file. If you meant to do that, then feel free to close the bug.
Actually thats a certain germans doing. I'ts annoying but not fatal and has been fixed in a later version Phil =--=