We are tentatively planning to drop support for Debian 6 and Ubuntu 12.04.
Going forward we are moving to Debian 7 (Wheezy) and Ubuntu 14.04 LTS (Trusty Tahr).
This move is driven by the need to use a more modern C++ compiler and std lib on Linux - basically internally we are switching to Clang and libc++.
This change will happen in one of the releases following AVBlocks 1.11.