Bug#310047: libc6-amd64 upgrade conflicts with unrelated libc6-x86
> When upgrading libc6 it checks for other installations of libc on the same
> system. Unfortunately it does not distinguish between the amd64 and x86
> versions and stops the installation although no real conflict would
> have resulted since the conflicting version is x86 and not amd64.
If you still think this is a bug, could you give us a little more
detail? It only complains about copies installed in the wrong
location; yes, it will whine if you have an i386 system and amd64
libraries installed in /usr/local/lib64. But that's probably a good
thing to whine about, since they ought to be in /lib64.
I've verified that it won't complain about properly installed 64-bit
libraries on i386.