You know, as much as I want to hate on this movie, there is still a lot I like. As far as Nuking the Fridge goes, yes it stretches credability but Indy has never been about realism. What about Temple of Doom where he falls out of an airplane with an inflatable raft. No raft is going to float you down safley to the ground or let you land softly enough to not injure yourself. Surviving in the fridge is no different except the fridge ride was probably rougher. The point is just the idea that maybe it could work.
For the most part, the movie is pretty good. Even though plot points are pretty obvious, it's not like other Indiana Jones films had huge plot twists or revelations. You could see stuff coming in those movies as well. The Jungle chase does bug me. Compare it to Raiders of the Lost Ark where Indy fights his way through that caravan or Last Crusade with the fight on the tank and there is no comparison. Those latter chases and stunts look better because they look real. The digital effects in the Jungle chase detract because they don't look real. It comes off as fake and so I found myself uninterested because it was too fanatastic. Although the scenes with the Fire Ants was awesome. Most tension in the whole film. The ending is fine right up until they all gather in the Skull chamber. Then there is nothing left to see and it raises more questions and confuses everything.
Less digital filming and computer special effects to a more realistic look along with a changing up the jungle chase a bit and changing the ending and this would be fine.