London, but here's a good example.
I've sene Les Mis four times, and every single time there has been something different.
When I saw it in London for the first time in 2008, the pre-Master of the House section was completely gone, as well as a lack of little Eponine. The second time I saw it, it was the tour in 2009, with a new verse added to Lovely Ladies, the pre-Master of the House back in, and Little Eponine being present. The third time, was the tour again, the new Lovely Ladies verse was gone and I do believe Little People was significantly shorter than the first time I saw the tour, and the O2 concert had countless changes once again, no Little Eponine, "Hey Eponine what's up today..." all cut, as well as everything in between, it just went straight into "Stay out of this, but Eponine.." etc etc.
It seems to me, that Les Mis in particular is constantly changing. I know only two of those are the same production, but my brother had seen it three times prior to that in London, and said that there were prominent changes each time.
It's odd how it's such a celebrated show, and there's not really a definitive version.
THEATRE 2016:
Grey Gardens; SwkPlayhouse, Cats; London Palladium, Into the Woods; Royal Exchange, Show Boat; Sheffield Crucible, Les Liaisons Dangereuses, Prsicilla Queen of the Desert; UK Tour, Narrative; RWCMD, Mojo; RWCMD, The Barber of Seville; WNO, Rabbit Hole; Hampstead, The Marriage of Figaro; WNO, Figaro Gets a Divorce; WNO, Tom: The Musical; UK Tour
Upcoming: Anything Can Happen; RWCMD, Cysgy'n Brys'ur, Long Day's Journey Into Night; Bristol Old Vic, Only the Brave, The Caretaker; The Old Vic, People Places and Things, Blue/Orange; Young Vic, Bernadette Peters, Carole King, Harry Potter and the Cursed Child Parts I & II