Here's one:

glibc6-dev is not installable, because it's newer than glibc6...

I think this relates to the SDK repos, actually, which I'm not supposed to use on the device; but I think it would cause the same problem in the SDK? Alas, I haven't the time to set up the SDK, and I have only a vague knowledge of the Debian repository & apt system, so I'm not entirely sure it is a bug. But it sure looks like it from here.