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Some great developers from the iOS jailbreak community have put together a huge giveaway called iOSPromo for the holiday season. Filippo Bigarella, David Ashman, stm, Yllier, and Elias Limneos are all giving away multiple copies of their popular jailbreak packages for free to their Twitter followers.

The giveaway lasts for one week and includes popular jailbreak tweaks like LockInfo and Springtomize 2. More details after the break…

If you visit ios-promo.com you can see all of the details for the giveaway. 7 of the best jailbreak tweaks are being given away for free to random followers on Twitter, so contestants must be following each of the jailbreak developers behind the giveaway to be considered. More details, including each developer’s Twitter handle, are included on the promotion’s website.

Not only are these all great tweaks for iOS 5, but they all come from excellent developers that have a real heart for the jailbreak community. Combined, these tweaks total about $20, so you have a chance to save on some essential packages for your jailbroken iOS device.

iOS Promo is giving away a grand total of 65 jailbreak tweak licenses, so there’s a good chance that you could win something. Each developer has noted how many licenses are being given for each package on the promotion’s site.

You need to tweet out a message and follow each developer to enter, so head over to ios-promo.com!

If you’re looking to supercharge your iPhone’s Mobile Safari browser, then look no further than Cydia. There, jailbreakers will find a plethora of tweaks to add certain features to Apple’s bare bones web browser. In fact, there are so many tweaks available on Cydia that it’s easy to get lost if you’re relatively new to jailbreaking, or even if you’ve been going at it for a long time.

With that in mind, we’ve put together a list of five of our favorite jailbreak tweaks to get the most out of Mobile Safari. Some of he tweak are not free.

Safari Download Manager
Safari Download Manager is a great application that really unleashes to power of the iPhone, allowing you to download and save on your device virtually any file out there. support ios 4 only.

FullScreen for Safari – $2.19
This tweak allows you to enable full screen mode in Safari, along with OS X Lion like gestures for navigation. FullScreen for Safari is an extremely well thought out tweak, especially for those who lament over the iPhone’s 3.5? screen.

Gridtab for Safari – $1.50
If Apple’s tabbed browsing interface infuriates you, don’t worry; you’re not alone. GridTab for Safari places your tabs in more legible grids for easy identification.

Tab+ – Free
This tweak lends you the ability to open more than 8 tabs at once. We’re not sure what the limit is, but we’re guessing you can keep going until your device runs out of memory.

Safari Unibar – Free
A very interesting tweak that allows you to have a Google Chrome styled OmniBar to perform both searches and direct URL browsing using only one bar. The dedicated search bar is no more with Safari UniBar. To that we say good riddance.

What do you think about this list? Is there anything obvious that I missed? Let us know in the comments!

Saurik has pushed an update for MobileSubstrate that addresses the crashing of jailbreak tweaks from Cydia on the iOS 5.0.1 untether. Coincidentally, RedSn0w was updated this morning with a fix for MobileSubstrate crash errors as well by released the RedSn0w beta3 version.

Users that are jailbroken on iOS 5.0.1 can install version 0.9.3955 of MobileSubstrate now in Cydia to fix tweak crashes. Another huge perk is that MobileSubstrate no longer requires that you reboot iOS every time you install or upgrade the package.

Long-time jailbreakers know the pain of having to reboot your iOS device every time MobileSubstrate installs or upgrades itself. That is no longer the case thanks to this new version.

Users have reported that certain Cydia packages crash on the iOS 5.0.1 untethered jailbreak, so this MobileSubstrate update should fix the issue. Saurik has also noted that Substrate is now compatible with the idea of a “semi-tethered” jailbreak, indicating the possibility of an easier jailbreaking process in the future.

The Dev Team has released beta 3 of RedSn0w for the Mac and PC to fix an error that caused MobileSubstrate to sometimes crash on jailbroken iOS devices. This specific error only seemed to crash MobileSubstrate when the latest iOS 5.0.1 untether in RedSn0w was run over an existing jailbreak.

From the Dev Team blog:

The b3 version of redsn0w fixes a problem where re-running redsn0w over an existing jailbreak would cause MobileSubstrate-based apps to stop running until MS was installed again. Now you can re-run the redsn0w jailbreak step without worrying about that (but still remember to de-select the “Install Cydia” option if it’s already installed).

Another tip: If RedSn0w tells you that no identifying data was found when it auto-detects your IPSW, then you can pre-select your iOS device’s 5.0.1 IPSW in RedSnow’s Extras >Select IPSW menu.

As always, you can download the latest RedSn0w beta from below. This latest beta follows an update from yesterday that fixed the “launchctl” error in Cydia. We have the tutorials for jailbreaking iOS 5.0.1 for Windows.

Download
RedSnow 0.9.10 beta 3:
Mac
Windows

Celcom is now throwing the Playbook at low prices while stocks last. You can now get a Playbook from Celcom WITHOUT contract at the following prices:

BlackBerry Playbook 16GB – RM1,088
BlackBerry Playbook 32GB – RM1,388
BlackBerry Playbook 64GB – RM1,688

As comparison, the prices above were previously tied with 24 months contract for existing Celcom BlackBerry contract extensions but now it is offered outright.

The only problem though is that the offer is valid until 31st November 2011 maybe this is a typical typo error.

If you have been eyeing for a playbook, head over to Celcom’s Playbook page.