This happens because libc6 has been upgraded (bumped from 2.6.1-1ubuntu9 to 2.6.1-1ubuntu10) and all other libc6-* has not been updated their requirement.
My bug was the libc6-i386 (also in amd64), so I guess all libc6-* packages needs to update their requirement.
I have filed a bug with same dependency problem: /bugs.launchpad .net/ubuntu/ +source/ glibc/+ bug/162681
https:/
This happens because libc6 has been upgraded (bumped from 2.6.1-1ubuntu9 to 2.6.1-1ubuntu10) and all other libc6-* has not been updated their requirement.
My bug was the libc6-i386 (also in amd64), so I guess all libc6-* packages needs to update their requirement.