[arch-general] Perplexing libjpeg-related packaging issue

[bardo]

Hi guys.
Yesterday I rebuild mldonkey since it depended on libjpeg. On x86_64
there are no problems, and everything works as expected; this is not
the case for i686, where there's a strange problem:

[root at plafone ~]# ldd /usr/bin/mldonkey | grep libjpeg
        libjpeg.so.7 => /usr/lib/libjpeg.so.7 (0xb7f1c000)
        libjpeg.so.62 => not found

The package was created with makechrootpkg in a clean chroot. How is
it even possible to link with two different versions of the same
library? And where did it get the old version, since it didn't exist
in the chroot?
I'm trying to rebuild a sane version now, but if anybody has a clue
I'd be happy to hear it :P

Corrado