1-In DVD to Mobile conversion, select Generic
2-Make sure there are 4 conversion tasks in your 'DVD to Mobile - Task List' (4 movies YOU KNOW have stubtitles)
3-For all of them, Make sure 'Extract to idx/sub file' is selected
Note that only the first item in the task list will have IDX and SUB sutbtitles properly extracted. The others may or may not have them. You'll still get an AVI file, but without companion subtitle files. It's totally random. Seems to happen a lot more on XP than Vista.
Can you please fix this for the next beta?