I watched the video the OP posted and honestly it looked like he was missing all the shots because he was aiming bad. If I knew where that was I would make a video where I hit that same target. I maintain it is an aiming issue NOT a software problem. I have not had a problem nor has anyone I know and we all play archers like they are the only thing the game made.
edit: And if I get the information and cannot hit the target I will concede that there might be a software bug and not an aiming issue but I lack the information to replicate this "bug"
So you watched the video in the main post? This video? http://www.youtube.com/watch?v=sxmNZDhQEnY
Because I just watched it and he is aiming just fine. Watch the video in 1080p and put it on full screen, you can CLEARLY see the arrow going right through the guys chest.
As for "information", there have been several places that people have been able to replicate this bug...I'll list one to help you out
I'd like it if someone could test the settings on different people/creatures with and without the tweak. I'm honestly not seeing a difference with these added settings now that I've altered targets. Some things you can hit from a distance no problem, others not so much, no matter the ini setting!!
Could someone please try and verify/disprove my results.
*time passes as I decide to test some more after typing the above*
Ok, I am convinced 100% this is placebo after playing around some more!! (I could be wrong however, but I'm pretty convinced.)
Outside of Whiterun there is the stable, with the horse and cart in front of it. Looking south you see Pelagia farm with cow in a pen to the right of the farm house. I stood just to the left of the horse and cart http://img.photobucket.com/albums/v482/jasonsteele/Game%20Stuff/ScreenShot34.jpg, by were the person with the dog is standing. Nothing I lobbed http://img.photobucket.com/albums/v482/jasonsteele/Game%20Stuff/ScreenShot35.jpg. Well, they stuck, into the ground behind it.
Now I stand on the rock in front of the farm house. Approximately the same distance as the reverse to shooting the cow. I look towards the horse and cart and aim for the driver, Bjorlam, a tiny spec in the SS, and http://img.photobucket.com/albums/v482/jasonsteele/Game%20Stuff/ScreenShot33.jpg.
This is all with or without the tweaks. Seems some things get immunity while others do not. I had high hopes for this setting but again, from all my testing today I see 0 change, nadda.
I don't mean for this to be insulting if it comes across that way. I truly welcome for anyone else to prove or disprove it. I just personally do not see it.
edit: Changed "without" to "with or without" and added (SS) the screenshots to differentiate from underlines.
ok so where do I put this
f1PArrowTiltUpAngle=0.0
f3PArrowTiltUpAngle=0.0
http://www.youtube.com/watch?v=6_fScGaH_Xk
Add it to the [Combat] section of the Skyrim_default.ini in your Skyrim folder