Please note that Amazon have decided to put this review on both the Park Circus and the Criterion blu-ray pages. The review I posted below concerns the Park Circus blu-ray only, and I neither intended nor expected it to crop up on the Criterion blu-ray page.
Park Circus seem to have got things the wrong way round here. The 1925 original (restored by Kevin Brownlow) is the version that people want to see on Blu Ray, not the 1942 version with Chaplin's commentary. The DVD contains everything, including all the extras and Brownlow's restoration of the 1925 original, whilst the Blu Ray only contains the 1942 version of The Gold Rush. All in all this release is not what it appears to be ... disappointing and deliberately misleading. Caveat emptor.