The version screened at film festivals was about 2 minutes longer than the one released later on blu-ray. The cuts include a lot of bits of scenes and dialogue (usually only about a few seconds) throughout the whole movie and were made for better pacing.
The limited edition version TROMA released on Bluray/DVD in 2012 was not the final cut of the film. The version they released was 30 seconds longer, was missing a number of sound effects, missing some color tweaks and missing a couple additional shots that were added to Walnut's death. The FINAL CUT of the film is 1 hour, 38 minutes and 32 seconds.