That's not good news, since it seems Centos 6.4 won't have GLIBC higher than 2.12 for the foreseen future.
Couldn't the .so be compiled using the old version of GLIBC? The previous version gets me a different error:
Code:
failed to dlopen /home/bzg/tf2/tf/../bin/vaudio_speex.so error=/home/bzg/tf2/tf/../bin/vaudio_speex.so: undefined symbol: Q_stristr
failed to dlopen /home/bzg/tf2/bin/../bin/vaudio_speex.so error=/home/bzg/tf2/bin/../bin/vaudio_speex.so: undefined symbol: Q_stristr