It doesn't work with my FW v1.1 too, because v1.1 is based on 1.5.0 kernel.
Doc, I'm a bit confused… I thought (based on the Russian forum quoted before, see here #12042) that v 1.1 was based on the DX90 2.0.5 ? - at least I interpreted "все прошивки на базе v2.0.5 для DX90" to mean that, but my russian, unfortunately really isn't that good, so forgive me if I'm wrong… I thought that your v 2.0 was the one based on DX50 1.5.0?