iconv transliteration is broken in any charsets but UTF-8

[LStranger]

In ubuntu 11.10 iconv (package libc-bin 2.13-20ubuntu5.1) is broken. If you run a command (with encoding koi8-r)

echo проба|LC_ALL= LC_CTYPE=ru_RU.KOI8-R iconv -t ascii//translit

then you get output

?????

while when encoding is utf-8 then command

echo проба|LC_ALL= LC_CTYPE=ru_RU.UTF-8 iconv -t ascii//translit

generates output

proba

iconv in 12.04 (libc-bin 2.15-0ubuntu6) has no such bug, both encodings generate 'proba'. Hope you'll backport the fix. Thank you.