bzed@hal:~$ apt-cache madison ia32-libs-gtk
ia32-libs-gtk |        1.0 | ftp://ftp.de.debian.org testing/main Packages
ia32-libs-gtk |        1.0 | ftp://ftp.de.debian.org unstable/main Packages
ia32-libs-gtk |        1.0 | ftp://ftp.de.debian.org testing/main Sources
ia32-libs-gtk |        1.0 | ftp://ftp.de.debian.org unstable/main Sources
bzed@hal:~$ apt-cache show ia32-libs-gtk
Package: ia32-libs-gtk
Priority: optional
Section: libs
Installed-Size: 9484
Maintainer: Debian ia32-libs Team <debian-ia32-libs@lists.gag.com>
Architecture: amd64
Version: 1.0
Depends: ia32-libs (>= 1.18)
Filename: pool/main/i/ia32-libs-gtk/ia32-libs-gtk_1.0_amd64.deb
Size: 3568066
MD5sum: b770c440a579ae4793fbcd735580809b
SHA1: e0d7758820ee8e3b49f05e008cde56ee5fb85510
SHA256: 02cf2e68437242991504dd0aae3e49bae54f3d2e3763ef0d8d6f207defebcf73
Description: gtk+ ia32 shared libraries
 This package delivers a set of pre-compiled ia32 (i386 family) shared
 libraries, so that third-party 32bit programs can use the GTK widgets on
 64-bit systems that include appropriate emulation support.