Ars reviews KDE 4.0.0: "KDE 4.0 was officially released last week after extensive development. The long-awaited 4.0 release ushers in a new era for the popular open-source desktop environment and adds many intriguing new features and technologies. Unfortunately, the release comes with almost as many new bugs as it does features, and there is much work to be done before it sparkles like the 3.5.x series." They were also at the KDE 4.0 release event.

One of the three authors of Sun's DTrace, Adam Leventhal, has discovered something very interesting using DTrace on Mac OS X. "As has been thoroughly recorded, Apple has included DTrace in Mac OS X. I've been using it as often as I have the opportunity, and it's a joy to be able to use the fruits of our labor on another operating system. But I hit a rather surprising case recently which led me to discover a serious problem with Apple's implementation." So, what is this problem? "Wow. So Apple is explicitly preventing DTrace from examining or recording data for processes which don't permit tracing. This is antithetical to the notion of systemic tracing, antithetical to the goals of DTrace, and antithetical to the spirit of open source. I'm sure this was inserted under pressure from ISVs, but that makes the pill no easier to swallow. To say that Apple has crippled DTrace on Mac OS X would be a bit alarmist, but they've certainly undermined its efficacy and, in doing do, unintentionally damaged some of its most basic functionality. To users of Mac OS X and of DTrace: Apple has done a service by porting DTrace, but let's convince them to go one step further and port it properly."

Two interesting newsbits from the Amiga Forever camp. First, they got Amiga Forever running on the OLPC, and secondly, they also got it running on the Eee PC. The next version of Amiga Forever will support both these platforms. The release is scheduled for somewhere in 2008.

"The Axiotron ModBook has been called a lot of things since we first saw it at Macworld 2007, from an amazing product that Apple should have made to vaporware. Why the latter? Because an entire year later, customers who preordered the third-party Mac tablet are still waiting for their orders to arrive. The device's ship date has been pushed back multiple times without much explanation, but on December 31, the company announced that it would finally ship the darn thing, and with new specs. Now that the MacBook Air is out, some wonder whether the ModBook is once again behind on its technology. We took the opportunity to catch up with Axiotron CEO Andreas Haas at Macworld 2008 to see what the holdup was really about, and whether the company plans to turn the MacBook Air into a ModBook Air."

"There is no ideal software, it always has bugs. Minor, major or security issues will always exist and modern operating systems need to deal with this fact. What if any software which user installs had a capability to rollback to previously known successful point and operation itself would take no time? What if developer or user has a tool which could checkpoint operating system and capability to revert changes in no time? This is possible if we will marry two great technologies: ZFS and Debian APT. Both technologies now part of Nexenta Operating System which is core foundation for its derivative distributions. Meet apt-clone. The tool which integrates with the NexentaCP system, keeps track of upgrade checkpoints and allows to create/destroy/edit checkpoints by request."

El Reg has an in-depth review of the XO laptop. They conclude: "There's a lot to like about the XO laptop. It's tough, it's great as an eBook reader, it has a big (for its category), high resolution screen. It runs silent and cool, has good battery life, and the clean design of the Sugar interface is easy to use. But several areas need work. The browser should be replaced by Firefox, and the Journal needs to support folders to match how people actually organise their work and play. Multimedia performance needs to be improved, which can hopefully be done through software. The XO needs a unified media player that supports all media types, along with playlists, and should be integrated with the UI. Most of these changes come down to the OLPC organisation placing more emphasis on real-world usability and less on their ideals of a perfect interface. If they can manage to do this, the XO laptop could be a great tool for learning and play."