I have both gcc-3.4.6 and gcc-4.1.1 installed in my system, with the latter selected as my default compiler. However, with the gcc-3.4.6 first in my /etc/ld.so.conf, I get the following linker error: /opt/skype/skype: /usr/lib/gcc/i686-pc-linux-gnu/3.4.6/libstdc++.so.6: version `CXXABI_1.3.1' not found (required by /opt/skype/skype) /opt/skype/skype: /usr/lib/gcc/i686-pc-linux-gnu/3.4.6/libstdc++.so.6: version `GLIBCXX_3.4.4' not found (required by /opt/skype/skype) With gcc-4.1.1 listed first (and re-running ldconfig), Skype works fine. None of my other software, whether binary or compiled with gcc-4.1.1, seems to care.
We can fix exactly nothing w/ Skype.
I got the same error messages, but I have gcc-3.4.6 and gcc-4.1.2 installed, and gcc-3.4.6 was my default gcc. After setting my default gcc to 4.1.2 using gcc-config, skype runs fine.