데비안 불안정성: ia32-libs를 사용할 수 없습니다

Debian Unstable(amd64) 내에서 dist 업그레이드를 한 후에는 32비트 프로그램을 ia32-libs설치할 수 없기 때문에 더 이상 사용할 수 없습니다:

# apt-get install ia32-libs
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ia32-libs : Depends: ia32-libs-i386
E: Unable to correct problems, you have held broken packages.

# apt-get install ia32-libs-i386
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ia32-libs-i386:i386 : Depends: libcups2:i386 (>= 1.4.4-7+squeeze1) but it is not going to be installed
                       Depends: libcurl3:i386 (>= 7.21.0-2) but it is not going to be installed
                       Depends: libgssapi-krb5-2:i386 (>= 1.8.3+dfsg-4squeeze2) but it is not going to be installed
                       Depends: libk5crypto3:i386 (>= 1.8.3+dfsg-4squeeze2) but it is not going to be installed
                       Depends: libkrb5-3:i386 (>= 1.8.3+dfsg-4squeeze2) but it is not going to be installed
                       Depends: libkrb5support0:i386 (>= 1.8.3+dfsg-4squeeze2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

예를 들어 google-earth를 실행하려면 어떻게 해야 하나요?