Hi,
small update to the bug report.
The libc6-i386 package screwed up the transition by forgetting to
delete the /lib32 and /usr/lib32 in preinst. So on upgrades all files
remain under /emul/ia32-linux/ and the only thing that changes is the
way dpkg sees them.
So you don't need a Pre-Depends after all. But lib32gcc1 still breaks
upgrades of libc6-i386 (<< 2.9-14). You should conflict, break or
depend there.
MfG
Goswin