The aspect ratio on Enter the Dragon has been corrected on Vudu across all resolutions (SD, HDX, and UHD). However, like most other retailers, Vudu is only offering the Extended Cut with no special features.
The 4K on Vudu would get corrected, but not the HDX version, unfortunately, since Vudu uses separate transfers for each resolution (SD, HDX, UHD). Unless they request a new HD version from Warner.
Underworld is 1.78:1 in HDX, but the UHD is 2.39:1 on Vudu. The HDX was never corrected on Vudu...
Saw your identical post on the Vudu Forums first and replied to you over there, but basically, this is what I posted over there:
Since you watched it all the way thru, Vudu probably won't offer a refund, but I would contact customer service anyway. However, be prepared for Vudu to place blame...