For those in the Preview, here are some threads I've made that you may / may not want to bump with your support:
(50Hz is supposedly being fixed in the April update, but technically the release notes only mention Blu-rays and not DVDs, so I've posted about it anyway, especially as the latest 50Hz option currently does nothing)
Feedback section:
50Hz support needed for PAL DVDs
Feature request section:
50Hz support still needed for PAL DVDs
Controller battery level warning still needed
3D Blu-ray support needed
Dolby & DTS bitstream support is seriously flawed for a media player
Media Remote should be able to access DVD/BD menus
Pre-order and pre-load Digital Downloads