I have no idea which quest you're talking about, so maybe there's a reason this won't work, but it won't stop me from offering this answer: invisibility potion.

Diplomatic Immunity is a Main Quest, It is where you smuggle into the Thamlor Embassy to get the papers.

I don't remember having any issues with that quest. After the bar guy helps you get in the back room, I just killed everyone I ran across who attacked me first.

I didn't even bother sneaking around in the quest. Stormed my way through the embassy and lit things up with fire. For some reason Barbas still followed me through and was keeping most all the guards busy.

That has to be a bug, because you are not suppose to have any followers. Maybe I'll go grab barbas

I still haven't purchased this yet, but was planning to soon because the price has come down slightly. But there have been a lot of recent reviews on Amazon saying this game is glitched severely to the point of unplayable.

Is this true? I have a PS3, and do not want to put up with spending hours on a fun game and then have it be unplayable in the second half.

If the game were unplayable, it wouldn't have become a smash success. That said, I've been declining the most recent patch on Xbox due to reported problems (as have many others).

The PC version is very buggy (in my experience). I haven't heard of too many issues from console players other than random quirks that don't effect anything.

If it weren't for the console commands you can use on PC, the main story would have been glitched on me very early on. I still can't/will never be able to buy the house in Windhelm.

You're thinking of the 1.2 patch. The most recent patch (1.3), which just came last week, is fine - I've been playing with it all week and have had ZERO problems.

I didn't realize that had come out yet. Thanks for the heads up!

Barbas gets really annoying because he follows too closely, doesn't move for you, and pushes you. Aside from that he's awesome to bring into a fight. I'm rocking Barbas and Mjoll right now. Having two immortal followers comes in pretty handy, especially on boss fights.

<iframe width="560" height="315" src="http://www.youtube.com/embed/U-XcjDJ4rbw" frameborder="0" allowfullscreen></iframe>

Not the best lightshow but it was still well done.

is there a way to tell what level your follower is?
i think i read that the follower is the same level as you when you first meet him? rather than we he joins you?
That would really suck. It means you will always need to find a new follower.
I am using Uthgard and she dies very easily now and many times it is a permanent death causing me to reload.

I believe follower's skill progression does not level. So yeah that sucks, Uthgard should not die, unless you accidently kill them..or they get a Huge Poison DoT on them and they die.

For backstabbing:

Do you have to have a back stab perk? Or just do a power attack? And how do you do a power attack.

i know, noob questions

Backstabbing will do more damage by default but not to the extent you can get it to with perks and armor. To do a power attack, hold down the attack button rather than pressing it. Using the Assassin's Blade perk with the Shrouded Gloves or Hand Wraps makes the game real easy with a dagger if your sneak is decent.

Ahhh so I do need perks to do the crazy BS.

Yeah, it's the one that gives you 15x with daggers. That alone is pretty crazy; add the Shrouded Gloves and you'll be one-hitting pretty much anything you can sneak up to from behind. It's the only way I can take out Forsworn Briarhearts. Those guys mess me up if I can't take them out with a sneak attack.

I bet using Mehrunes Razor on top of all those would make it even easier.

Wait I have the 15X damage for daggers I think as well as the shrouded gloves, do I just need to do a Power Attack? (Press down on trigger?)

I don't think you have to do a power attack. That perk + the shrouded gloves gives you 30x damage with daggers on any backstab attack, power or regular (unless I'm not remember the perk correctly). Or you could use the Shrouded Hand Wraps for 30x on any sneak attack instead of only backstabs. I usually do power attacks just for the throat slit animation.

It doesn't even really matter at that point. I haven't run across an enemy I couldn't one-hit with the 30x damage. That being said, Mehrunes Razor is badass and the only weapon I use now other than a bow and Molag Bal for soul trapping.

So is this a bug? After I get barbas I literally can not go into sneak mode (ls) button on Xbox? Is this just a glitch?

I believe if you have a follower with you the sneak mode won't work. Try without barbas and see it that help.