I discovered the source of the problem via "apt-cache policy libogg0". Actually the libogg0 package came from another repository (trinity desktop environment). After removing the repository from sources.list and downgrading to the Ubuntu version of package libogg0 I could finally install ia32-libs. :)
I discovered the source of the problem via "apt-cache policy libogg0". Actually the libogg0 package came from another repository (trinity desktop environment). After removing the repository from sources.list and downgrading to the Ubuntu version of package libogg0 I could finally install ia32-libs. :)