Technknowledge

Update 2: Apple's U.S. Black Friday sale is up, and while not spectacular, there are some rare discounts to be found. To go back to the same examples we used for the U.K. and Australian Apple stores, the base model 13-inch MacBook Pro is $1,098, down from $1,199.

In fact, it looks like all MacBook Pro models are exactly $101 off, while the $999 white MacBook is not discounted at all. The 32GB iPod Touch is $268, down from $299.

This sale is good online and in Apple's retail stores and runs until 3 a.m. EST on November 28.

Update: Even though it's not quite Black Friday in the U.S. yet, it's past midnight in some other parts of the globe. Notably, Australia and the U.K. have both seen their respective Apple Web sites updated to reveal Apple's one-day sale. While we can't say yet that the deals in the U.S. will be exactly the same, there's no reason think they won't be.

On apple.com/uk, we saw a 13-inch MacBook Pro, originally £1,149, marked down to £1,078. On apple.com/au, the same unit was A$1,868, marked down from A$1,999.

Similarly, a 32GB iPod Touch is £208, marked down from £229 on the U.K. site, while while in Australia, it's A$358, down from A$399.

We've also examined some Black Friday deals from other retailers.

Our original post continues below:

According to purportedly leaked documents on the tech rumor site Boy Genius Report, Apple is gearing up to offer a series of post-Thanksgiving bargains on products from iPods to MacBooks.

The deal, allegedly good only on November 27, lists "up to" discounts of 30 percent on iPods (excluding the Shuffle and iPhone), 25 percent on Mac laptops and desktops, and 15 percent on accessories, software, and other hardware.

The Boy Genius Report Web site says: "One of our connects just hit us up with some intriguing Apple information. According to them, what you see detailed above is a shot of Apple's yearly Black Friday deals. It's reported to be something Apple will email out shortly."

Of course, with the vague use of "up to" and no specific products listed, we can't be sure if these will be good deals or not. But if you're interested in being the first in line to check them out, the leaked doc also says that select Apple stores will be opening at 6 a.m. on November 27.

(Credit: Boy Genius Report)

Firefox has a CPU usage issue and, consequently, can cause overheating problems in some laptops, particularly ultraportables. That's what I've found over the last couple of years.

But don't take my word for it. This is documented on a Mozilla support page entitled "Firefox consumes a lot of CPU resources." The page states: "At times, Firefox may require significant CPU [central processing unit] resources in order to download, process, and display Web content." And forum postings like this one about a Dell Netbook are not uncommon: "Mini9 would get way too hot."

The Mozilla support page goes on to say that "you can review and monitor CPU usage through specific tools" and describes ways to limit CPU usage, such as: "A Firefox add-on, called Flashblock, allows you to selectively enable and disable Flash content on Web sites."

Let me describe my experience. I find that tab for tab, Firefox uses decidedly more resources than other browsers--Safari, for example. And in the past (when I was actively using a Windows Vista-based machine) Firefox also compared unfavorably with Microsoft's Internet Explorer for CPU usage.

More specifically, here's the behavior as I see it. When I'm accessing sites with multimedia content such as the CNET front door, Firefox CPU usage will bounce around between 30 and 60 percent, and sometimes spike higher (80 percent and above), as indicated by the Mac OS 10.6.2 Activity Monitor.

On the other hand, the Safari CPU usage with the same pages open is much lower--typically between 2 percent and 10 percent.

My theory is that most users don't notice this because in mainstream laptops, this isn't an issue. But it can become an issue in ultraportables--typically under an inch thick--which are more sensitive to heat because of the design constraints. The ultrathin Apple MacBook Air, which I use as my main machine, is a good example.

The fan is usually an audible indicator of CPU usage issues. When I'm using Firefox and I have tabs open on multimedia-rich sites (which is par for the course these days), the Air's fan will almost invariably kick on and stay on until I close the tabs. As I write this, the fan has finally shut down after I closed the Firefox tabs (e.g, CNET front door). Those same tabs in Safari are still open and not causing any significant spike in CPU usage or fan activity.

When I contacted Mozilla, a technical support person guessed that Safari is possibly better at optimizing Flash-based sites compared to Firefox. And that may be true. However, I had similar issues before when I was using a Hewlett-Packard business ultraportable (also very thin like the Air) that were not necessarily tied to Flash usage. In short, Firefox was less efficient with CPU usage compared to Microsoft's IE 8. And the behavior was similar. The HP laptop would quickly heat up and the fan would kick on.

Finally, let me reemphasize that I'm guessing that most users don't notice this because heat dissipation is not a big issue for mainstream laptops that are not necessarily thermally-challenged when accessing multimedia-rich Web pages. That said, this has been a steady problem for me because I use ultraportables almost exclusively and has forced me to limit my use of Firefox.
Originally posted at Nanotech - The Circuits Blog

Another iPhone worm has been spotted in the wild.

Unlike the previous exploitation, which merely changed a jailbroken iPhone's wallpaper to a picture of Rick Astley of "Rickrolling" fame, this new threat allows hackers to steal sensitive information.

According to security firm Sophos, which wrote about the exploitation after a Dutch ISP spotted it late last week, the worm attacks jailbroken iPhone and iPod Touch devices only.

The worm "uses command-and-control, like a traditional PC botnet," Sophos wrote in a blog post on Saturday to warn users about the exploit. "It configures two startup scripts, one to execute the worm on boot-up, and the other to create a connection to a Lithuanian server to upload stolen data and cede control to the bot master."

Jailbreaking, which has been around for about two years, is a hack that enables iPhone and iPod Touch users to download applications unavailable through Apple's App Store.

Sophos wrote that the worm attacks users on several ISPs, including UPC in the Netherlands, Optus in Australia, and T-Mobile in several countries worldwide. Worse, the worm spreads faster on a Wi-Fi connection than a 3G connection. Users with affected devices might notice extremely short battery life while on Wi-Fi. According to Sophos, that's mainly due to the worm engaging in "so much network activity."

When a device is infected, it's assigned a unique number so that the attackers can easily pinpoint a single device. It also looks for authentication systems that use SMS, better known as mTANs. mTANs are frequently used by banks that send an SMS message with a password to mobile phones, allowing people to log in to their online accounts, Sophos wrote.

In essence, this threat is serious.

Sophos recommends that people with infected iPhones and iPod Touch devices restore them back to Apple's most recent firmware update. For now, there is no other way to fix the problem.
Originally posted at The Digital Home

Windows Mobile lost 28 percent of its smartphone market share between last year's third quarter and this year's third quarter, according to market researcher Gartner.

Figures released Thursday by Gartner show that Microsoft's mobile OS had 11 percent of the global smartphone market in Q3 2008. A year later, it had 7.9 percent. Meanwhile, the iPhone's share rose from 12.9 percent to 17.1 percent, and Research In Motion's share jumped from 16 percent to 20.8 percent.

Symbian's share fell from 49.7 percent to 44.6 percent over the same period--a 10 percent drop. The open-source Android OS from Google had no market share in Q3 2008 because it had only recently been introduced. In Q3 2009, however, it had 3.9 percent share.

"From one side, the market is going open source," Gartner analyst Roberta Cozza said. "On the other side, they have more closed environments like Apple and RIM. Microsoft is caught in the middle. They have to think hard [about] what they can do."

Read more of "Windows Mobile loses nearly a third of market share" at ZDNet UK.

If your iPhone was recently "Rickrolled" by a worm that targets jailbroken iPhones, the following six steps will show you how to change the root password--used to connect to your device via a Unix software secure shell--to protect yourself in the future.

Before starting, you will need to have MobileTerminal installed from the Cydia store. Then:

1. Tap the MobileTerminal icon to open a terminal window.

2. Enter su and press return.

3. Enter the current default root user password alpine and press return.

4. Type passwd and press return.

5. Enter a new password and press return.

6. Enter the new password again and press return.

The root password is now changed, and your jailbroken iPhone or iPod Touch is now a bit more secure than it was before and less vulnerable to the first worm detected that targets the iPhone.