Hi,
I've had this problem since monday, and I haven't read anything on the mailing list about it, so I figured I'd ask. most of the gnome stuff depends on libgnutls5 which won't install because it depends on the non-existant libopencdk0. I'm trying to upgrade from gnome2 in experimental. I had libgnutls5, which I tried uninstalling and I think that wiped out most of the experimental stuff. anyway, I'm kind of stuck now because all of gnome is broken. :)
Had the same problem today. I just added testing line to my sources.list (besides stable and unstable) and it solved the problem. I'm happy now with gnome2 not only at home, but at work also.
Cheers, MPiktas