My concern with the 2 pass process is that quality becomes degraded. The one pass Handbrake works very well but results in a file that is only playable on the Nokia Media Player and not on MPlayer.

A solution is to merge all the dvd vobs into a single .vob file using pgc.NET
http://www.clonead.co.uk/

This complete vob can then be converted using Media Converter or N800 Video Converter to an .avi which is playable by both media players.

Glitches such as unwanted audio track selection and aspect ratio problems can manifest themselves but these will be specific to each dvd. N800 Video Converter has the capability of correcting aspect ratio issues, so far for me at least.

Subtitle support would be a useful facility to have.