I'll let you decide what is accurate; ICE # 224 Nov 2005 (Springsteen cover)
Nov 22: 30th Anniv pkg; remastered CD and a DVD with revamped DTS 5.1 surround sound featuring the first 5.1 mix of the album's instrumental coda, "God Save The Queen."
...nor is it the first surround-sound treatment; a 5.1 mix in DVD-Audio and DVD-Video was released in 2002 by DTS entertainment. In the set's booklet, Queen guitarist Brian May boasts, "this is quite simply the best Night At The Opera ever produced. Never has the recording been so carefully balanced, so carefully cleansed of clicks and pops."
The 5.1 mixes created for the 2002 DTS release by May, original album co-producer Roy Thomas Baker and engineers Elliot Scheiner and Justin Shirly-Smith were updated by soundsmith Kris Fredriksson and remastered by the legendary Bob Ludwig. "They readdressed every track that was done for DTS."
Charlie D'Atri, director of marketing and special projects for Hollywood Records tells ICE "and, given given the time, space and the evolution of the technology, they tweaked throughout."
Besides the God Save The Queen 5.1 mix the other items that surfaced include newly restored vintage clips for Bohemian Rhapsody and You're My Best Friend. A new video for Good Company, live performance footage, photos, commentaries, interviews, etc.
I'm not sure what 'updated', 'readdressed' or 'tweaked throughout' mean besides marketing hyperbole, but all this is mentioned besides the remastering by Ludwig.