The major improvement is that now you can enable Anti-Aliasing in Star Craft 2 if  you're playing that game.
Other fixes, why not read the release notes accordingly to your OS, here you can cross-reference any related bugs/issues (if you are having them):
http://www2.ati.com/relnotes/catalyst_108_release_notes.pdf
Yes, the V1 got that vrm issue that deter me from buying that cooler in the first place.
@huzzLEE_82
Tak sempat ko reply lagi, aku akan tingkatkan dosage keracunan, biar aku teraskan guna style lawyer:

The 5870 has a pretty decent overclocking headroom, a 900/13xx OC preset for the 5870 is considered a pretty mild OC result. The FPS gains from gaming is almost unnoticeable...
At least you need to get up to 950mhz for a respectable OC'ing, but for 24/7 on the reference cooler, this is not practical because of heat and high fan speed noise.

This is when you need the aftermarket cooler. <Arctic Cooling Xtreme> There's couple of coolers in the market that suits the 5870.<Arctic Cooling Xtreme>
With an after-market cooler, <Acrtic Cooling Xtreme> you can get pretty low IDLE temps and importantly, to bring down the temps at high OC preset, which benefit you tremendously in the longevity of the card's life. <Acrtic Cooling Xtreme>
The bonus factors are that: your card will look superbly hot and it will be silent in your case! <Acrtic Cooling Xtreme> Imagine a hot girlfriend who doesn't talk much at all. <Acrtic Cooling Xtreme>
The 5870 combined with the Acrtic Cooling Xtreme should do the trick to facilitate in your overclocking journey. 


(I hope the subliminal message gets to you without resistance) 

i'm not seeing that in here but this vortex HD5770 looks very tempting..hehe..


HD5770 Vortex Review

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Added on August 26, 2010, 8:14 pm
The guide u can kindly download it from artic cooling website..That guide in PDF format and will tell everything u need to do before and after replacing the cooler..

>>Donwload the guide here<<

Follow the installation guide from Artic website. You should be fine.
Here's a link for you regarding the installation, but it's for Twin Turbo Pro. Almost the same.

Twin Turbo Pro

Same here!

I decrease the reso 1 increment back (for 16:9 monitors) and got full screen for Crysis.
The graphic is not bad at all though...
I only able to get a full screen @1920X1080 with a VGA or DVI cable.

On that note, I encounter an annoying bug for the 10.8 when using HDMI cable to get full screen (max scalling) on my AOC 2434,
the scale keeps reverting back to small every time I resart the comp and have to manually re-set the the scalling again and again...
Do you encounter this on 10.8? that is if you already updated to it....