I just upgraded to Bitcoin 0.9.0 and I got this:
0$ ./bitcoind
1./bitcoind: /lib/libc.so.6: version `GLIBC_2.15' not found (required by
2./bitcoind)
3./bitcoind: /lib/libc.so.6: version `GLIBC_2.14' not found (required by
4./bitcoind)
5
6$ ./bitcoin-qt
7./bitcoin-qt: /lib/libc.so.6: version `GLIBC_2.15' not found (required
8by ./bitcoin-qt)
9./bitcoin-qt: /lib/libc.so.6: version `GLIBC_2.14' not found (required
10by ./bitcoin-qt)
Sniff.
Red Hat Enterprise Linux 6 uses glibc 2.12.