Mavimao said:

I think I may have found a difference from the original version: when the naked hologram is dancing and THX is erm... Enjoying it, it cuts back and forth to LUH, contemplating taking her meds. Was this always the case? I have only seen the laserdisc and that was almost 10 years ago.

Yes, it cuts back and forth between them quite a bit during that scene, in both the 1978 and 2004 re-releases. That's not to say the sequence is exactly the same. I haven't seen this transfer myself yet, short on hdd space.

I saw one comment over at the Spleen mention the total run time is approximately 85 minutes, is that correct?