Earlier today, Apple seeded Beta 3 version of iOS 5 for iPhone, iPad, iPod touch and Apple TV to developers. The new beta 3 version includes: custom tones for tweets, Assistive Touch with Gesture Control, speed improvement, along with usual bug fixes.

While MuscleNerd of the iPhone Dev-Team has already confirmed that the existing version of Redsn0w 0.9.8 (Windows/Mac) for iOS 5 can jailbreak the Beta 3, another iPhone hacker ih8sn0w has just pushed an update to Sn0wbreeze for Windows which can not only jailbreak iOS 5 Beta 3, but can also preserve the baseband for iPhone 4 and 3GS users who rely on Ultrasn0w or Gevey SIM unlock.

Remember, this is a tethered jailbreak for all devices except for old bootrom iPhone 3GS. iPad 2 isn’t supported.

Also, this is intended to be used by developers only. Please proceed with caution.

Full release notes are attached as follows: 

sn0wbreeze v2.8b4 — For iOS 5.0 b3(9A5259f)
———————————————
* Intended only for developers (as usual).
* Hacktivation is disabled (again).
* MAKE SURE YOU UPDATE TO iTunes 10.5 BETA 3!
———————————————
Supported Devices/Tethered?
———————————————
iPhone 3G[S] (old bootrom)       [UNTETHERED]
iPhone 3G[S] (new bootrom)       [TETHERED]
iPhone 4 (GSM)                   [TETHERED]
iPhone 4 (CDMA)                  [TETHERED]
iPod Touch 3G                    [TETHERED]
iPod Touch 4                     [TETHERED]
iPad 1G                          [TETHERED]
———————————————
Those wondering, the jailbreakme exploit
cannot be integrated into applications
such as PwnageTool/redsn0w/sn0wbreeze.
———————————————
redsn0w seems to be having sandbox errors
due to it using the old b1 kernel.
I and many others have not seen any issues
with sn0wbreeze related to App Store apps.
If you prefer to use redsn0w, I am sure
@MuscleNerd is working on a fix.

Instructions for jailbreaking iOS 5 beta 3 are exactly to the last release. You can simply follow our detailed step by step instructions posted here to jailbreak iPhone 4, 3GS, iPad 1, iPod touch 4G/3G and Apple TV on iOS 5 beta 3 using this version of Sn0wbreeze.

Download Sn0wbreeze 2.8b4 for Windows