[Shrike]

Speaking as someone who knows way more about Star Wars than is healthy, like most of us here I'm sure, just why were Obi-Wan, Anakin and Palpatine captured in a ray shield? Those are those pesky things you fire proton torpedos through because lasers won't work, and droids just walk through like water. Why should it stop a group of humans in their tracks?
It is certainly possible that ray shields are unhealthy for living beings, but if so this should have been adressed at least subtley in the script. I'm sure there are any number of ways the problem could have been fixed, but like so many other things, it's just an inconsistent detail left hanging. Even just calling it a shield would have done it.
For any logical explanation to present itself though we would have to expect GL to give the details some thought deeper than, "does it sound kinda cool in a half assed way?".

[njamilla]

Yeah, ray shields are kinda dumb. You'd think that they're the perfect answer to any infiltration on any ship anywhere in SW. It would've saved all the trouble at the beginning of TPM.

[Shrike]

I am afraid the point of my post has been completely lost. The idea that a special trap or two had been set up by Grievous is not a big issue. He had faced Jedi before, so it doesn't really pose a problem to Episode I that the Trade Federation can't block off every corridor and toilet stall with shields like they can in Star Trek. The problem is that everything that we've seen (not even counting EU descriptions) has pointed to a big problem here. Obi-Wan, Anakin and Palpatine should have been able to walk right through ray shields like they weren't even there. Ray shields only block rays, and their lightsabers were off. Without some line of dialogue suggesting that it's dangerous for living things to cross them (unlike the droids), we can only assume that the trap was meaningless.