The DVD is shorter - has it been cut?
The run time for the film on IMDB is 114 minutes, and on the DVD 107. I have just watched Schultze for the second time, but this time on DVD, and there definitely appears to be a scene missing. If I recall correctly, Schultze is dancing with a woman (possibly in a dream sequence), and the whole scene presages the scene where he does fall ill.
I wonder what else might be missing... but I am sure as I can be that the scene I'm thinking of was there the first time I saw the film.
I think this is a beautifully understated film, and I love that it treats its audience intelligently.