I use debian 6.0.0.
I have installed
scim scim-m17n scim-gtk2-immodule m17n-db im-switch
I can write hindi fine in browsers & gedit using transliteration.
In vim I see that matra & letter are not positioned correctly.
Like in कु the matra उ appears before क . Here is screenshot
I am using 'Akshar Unicode' . 'Monospace' does not help either.
Do you get this problem ? Otherwise , what font you use ?