I've had this happen a couple times though mostly it's never an issue, but sometimes when I hit RB to use my shout nothing happens. I remember one time in particular I tried to shout and nothing happened, figured I didn't press down by accident, upon going to switch shouts to try and get it to work as I would usually when this issue popped up I was given a message saying I cannot change shouts while shouting(yet I had not shouted). However the other times it has happened(pressing RB and no shout) I just had to switch my power back and forth before being able to use my shout.

Obviously this is not game breaking, but a little annoying all the same. Particularly in the heat of battle when I'm trying to save my [censored] with a well timed shout. It seems to be rather inconsistent so I'm curious if anyone else has encountered this.

I've had this issue as well, but no message saying I had to let the shout recharge. After pressing the button about 5 or 6 times and nothing happening, I changed shouts in my favorites menu and then changed back to the one I wanted to use and it worked. It has happened about three times now and this fixed it each time.

I would just like to add a correction here, it was actually not a message about recharge, but rather that I could not change shouts while shouting. So it was as if I had used the shout, but without anything happening. I shall edit my original post also.

I'm glad to hear I'm not the only one with this issue.

I'm having this problem every once in a while, happened earlier on, two frost trolls jumped me so I went to knock them back . . . oh shi- they're still runnin at me and no pretty blue aura came out of me ruuuuun awaaaay!

this happens with me

I have died a few times now due to this, at first I figured I just did it wrong, but reloading and trying again it worked like it should, is very strange. Wonder if it's like the menu lag? Seems to not be working, then all the sudden it is. lol.

http://www.gamesas.com/index.php?/topic/1271601-shout-glitch/page__gopid__19263463#entry19263463

Me and some others are having the same and also very similar other issues with shouting. It svcks ass as I'm playing a pure warrior relying only on potions and shouts, and my shouts arent working, which results in me dying sometimes when i shouldnt have...

Happens to me too.
In combat mostly, annoyingly enough.

Or maybe thats just when I notice it.

same here...sadly there are many quick action controller bugs.
[sarcasm] FPSers have to slowdown and get hurt more. [/sarcasm]

I have found this also, mostly when using Magic then wanting to use a shout to deal some more damage. I find nothing happens, but when I try to use more Magic to cover my backside, a message comes up in the top right 'You cannot use magic while shouting.' I find that waving my sword once then 'resets' the current state of my character and I can then use the shout or continue with magic.

I've had the same problem with the shouts; I would press RB as usual...and nothing happens.
A few times I've tried to change to a different shout to see if it works but I get the message "You cannot use change shouts while shouting".

Usually though, if the shout doesn't work the first time I hit RB about three times and it usually works.
Seems that it has a slight lag occasionally, hope it gets fixed as I've had a few close calls due to this.

I don't think it's lag. I've had this happen to me, also, but it only happens whenever I get hit while trying to shout. I think it's just a way for the enemy to cancel your attack, as I've canceled enemies' shouts the same way.

It could well be, I've cancelled a few shouts from dragons with power attacks. That may be the cause of it.
I usually hit RB three or more times if it doesn't work the first time though.

I hadn't even thought of this, was never paying enough attention I suppose. I'll try to watch for it the next time it happens and see if this is what's causing my shouts to not work/stop. If that it the case though, I like it. I can stop enemies from using magic etc. so why shouldn't they be able to do the same.

I've also had this problem. Several times when I've tried to shout my character says nothing, then I'll tap RB 20 probably, and then the 21st time I'll shout normally and then afterwards i'll shout again when I hadn't prompted the game to do so but nothing happens because of the shout. My character just says the words. Wish I could provide more detail. If it happens again i'll come here with the low down.

I think that sort of thing should be based entirely off your stamina. You could compare doing that to a wizard in 3.5 D&D where if a wizard(or some other caster) casts a spell with enemies nearby the wizards provokes opportunity attacks and must succeed on a concentration check or lose the spell. My character has a pretty buffed up stamina so if it were the case in Skyrim something like that shouldn't happen to him, not saying that the situation i've put forth is fact within Skyrim. It makes sense logically however. If you get hit while yelling at someone you're not just going to stop yelling and start crying. I haven't noticed being able to interrupt shouts myself so I'm still convinced that it's lag in the game.

The exact same thing happens to me too.