The most pernicious of these is the music that has been tolerated in churches. We now have the lion's share of evangelical church congregations segregated by "traditional" worship and "contemporary" worship. Abominable. And much of the "contemporary" music featured in these services would make most Christians blush if performed in the sanctuary only 20 years ago.
I've also noticed that the contemporary worship services are incrementally preempting the traditional worship, with congregations feeling the need to have at least one "with it" piece in the service to placate the "emergent" crowd. Contemporary services are also vying for prime scheduling times as well. The conservative Baptist Church my mom attends has relegated the traditional worship service to 8:30 with the contemporary service winning the prominent 11:00 spot. The evangelical church I have been attending still have the traditional service at 11:00 (with a "rock" service held concurrently in another auditorium but with the sermon videoed in), but the early and evening services are both modern.
Go ahead and accuse me being "prudish," but this is exactly how the incremental move toward the heresy we are witnessing starts.
I help lead our early, contemporary service. I actually prefer the traditional service, and would love it if it were at 8:30. I believe it is probably fair to say that the form of worshiop has changed a lot since New Testament times. That is not inherently a bad thing. In fact, “shaking things up” a bit can keep our worship fresh rather than being mechanical. As long as the focus is on the worship of God, and not centering things on ourselves, I am ok with it.