A few minutes ago I pushed gnutls 2.0.0, OpenCDK 0.6.4 and libtasn 1.1 to testing. Though all of them have a new major version number, only OpenCDK has had a so-bump. It seems that GNUTLS is the only package that depends directly on opencdk, and running lddd.sh on my system shows no possible rebuilds for this upgrade.
Please give these libraries some testing, as they're an important part of your system. Report bugs to flyspray so we can rebuild these broken applications.