charset_table doesn't work for Sphinx RT indexes?

Question

Hello,

I'm using Sphinx 1.10.1. I created an RT index and configured its charset as follows:

charset_type = utf-8
charset_table = 0..9, A..Z->a..z, _, a..z, U+410..U+42F->U+430..U+44F, U+430..U+44F, U+00E1->a

According to that, "á" character should be accepted and translated into "a". However, index does not accept "á" characters.