Really? I saw a preview the other day that had given it an 'R' rating, which excited me because he was going to be Yippee-ki-yay'ing Russian motherfuckers.
I thought the fourth installment was decent. Possibly because I had heard it get trashed relentlessly and had low expectations prior to watching it. Without the language, blood, and gritty violence it didn't seem like a typical Die Hard, but was still somewhat enjoyable sans taking down a helicopter with a car and a few other scenes. What's next him surviving a nuclear blast in a refrigerator? He ain't no Indiana Jones! 8)
Might check it out in theaters if it is rated R otherwise I'll wait until it comes out on DVD. None of them are going to ever top the original though.