Currently, 'fink -m' refuses to take field values that have non-ascii characters in them. ASCII limitations aren't really acceptable for software in this day and age (hasn't been for over 10 years now). Please support unicode characters in package description files.
The least obtrusive solution would be to fix the encoding of a package description to UTF-8. This would keep backwards compatibility with older package descriptions, and shouldn't break anything/much. Such a limitation is also an acceptable approach taken by other software.
Then again, I'm no fink expert, so I can't estimate impact correctly.