FYI, the linux binary doesn't run out of the box on CentOS 6 (6.5 fully updated).
./bitcoind -daemon
./bitcoind: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by ./bitcoind)
./bitcoind: /lib64/libc.so.6: version `GLIBC_2.15' not found (required by ./bitcoind)
./bitcoind: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./bitcoind)
EDIT:
I made gitian builds of 0.9.0 that should work on the same operating systems as the 0.8.6 builds. However the builds in
https://github.com/bitcoin/bitcoin/pull/3914 might eventually be better if it becomes an official fix.