David Engel writes ("Re: Bug#2655: ld.so includes header file, clashes with old libc"):
...
> OK, I understand it now. Thanks. I just hope this overloading of
> Replaces (with and without Conflicts) doesn't bite us later.
It doesn't seem particularly likely to me, since you can control both
whether the package Conflicts and whether it Replaces, thus getting
whatever combination of behaviour you want.
Ian.