Based on all the user feedback ignited by the Windows 7 beta, Microsoft has made a set of tweaks to the release candidate of Windows 7. The Engineering 7 weblog details 36 of those tweaks, in quite some detail actually. Let's take a look at some interesting ones.

The realtime preemption project is a longstanding effort to provide deterministic response times in Linux. But for the last year progress toward getting the realtime work into the mainline has slowed. On February 11, Thomas Gleixner and Ingo Molnar resurfaced with the announcement of a new realtime tree and a newly reinvigorated development effort, LWN has a interviewed them.

Microsoft plans to release "something akin to" a netbook version of Windows, but for servers, not PCs, over the next month or two, Microsoft CEO Steve Ballmer said on a call with members of the financial community on Tuesday. He said that although there is not high demand at the moment for netbook-like server hardware, declining prices in the server market make a low-cost OS an attractive option for customers. "We don't exactly have a netbook phenomenon, but if somebody can buy a $500 server, they're a little loathe to spend $500 for the server operating system that goes with it," Ballmer said. He described the software as a "low-cost, low-price, low-functionality Windows Server SKU" called "Foundation Edition," but did not offer more details.

A few days ago, we concluded (yes, we did!) that it was cool to run Windows 3.1 on your Nokia N95 using Qemu. Of course, the Apple world couldn't stay behind, and now we have one of Apple's obsolete operating systems running on the iPhone: System 7, also using Qemu.

Developers willing to dish out the $400 required for an unlocked Dev Phone 1 won't be happy to find that access to paid market applications has been disabled by Google. It was possibly done to sloppily patch up a loophole that supposedly gave users of the unlocked phone the ability to download all applications for free. What little information Google would give as to why they made this decision included, "These phones give developers of handset software full permissions to all aspects of the device... We aren't distributing copy protected applications to these phones in order to minimize unauthorized copy of the applications." What makes this more interesting is that, at least according to Engadget, an unlocked original G1 doesn't have this limitation. It's rather ironic that a developer using said phone won't be able to access his or her own paid app. Let's hope Google remedies this quickly as you never know when an angry mob of app-deprived developers will storm the Googleplex with torches and sporks.

It's arriving about two months later than originally scheduled (and didn't arrive in 2008 like Intel wanted), but X Server 1.6 has been officially released this afternoon and it wasn't 212 days late like the infamous X Server 1.4.1 release. X Server 1.6 introduces the server bits for Direct Rendering Infrastructure 2 (the 3D bits can already be found in Mesa and the Intel driver), X Input 1.5 with device properties, Predictable Pointer Acceleration, and RandR 1.3. Beyond those key features, there are also a number of bug-fixes, EXA improvements, and various other improvements.

A Microsoft spokesperson confirmed to Betanews this afternoon that the first release candidates (without numerals) for Service Pack 2 for both Windows Vista and Windows Server 2008 will be released to the general public for testing next week. This after private testers with the MSDN and TechNet services receive their copies first.

Stanislaw Sszymczyk accepted the AROS browser bounty last December, ten months after Robert Norris' work that provided a partially working Webkit port. Now, after just three months he delivers the first public beta of the AROS port of OWB.

The UK Government has said it will accelerate the use of open source software in public services. Open source software will be adopted "when it delivers best value for money", the government said. It added that public services should where possible avoid being "locked into proprietary software". Kroc says: Very welcome, but let's believe it when we see it, the UK is famous for failed IT projects. You can start by removing the DRM from iPlayer.

Microsoft's CEO Steve Ballmer had some interesting things to say yesterday about which companies Microsoft sees as its competitors in the client operating system space. You'd think Apple was their number one competitor - and you'd be wrong. Microsoft sees two other competitors as their primary adversaries.

Among the many new features for Fedora 11, a newly added one is Nouveau becoming the default driver for Nvidia cards in Rawhide. Nouveau is an effort to create a completely free and open source 3D driver for Nvidia cards. Fedora 7 originally included this driver installed but not enabled by default. Red Hat recently hired Ben Skeggs, one of the primary Nouveau developers and Nouveau driver has been accepted by the Fedora Engineering team to be the default driver for Nvidia cards with the legacy nv driver as a fallback option. Nouvaeu already supports more chipsets, RANR 1.1 support, Accelerated XRENDER, Textured Video support for many cards that are not covered by the nv driver which has been hampered by a lot of obfuscated code as well. Phoronix has other details.

InfoWorld's Rick Grehan offers a two-part roundup of 13 specialty Linux distros, each of which constructs a user environment tuned to a specific application or, in the case of Ubuntu Christian Edition and Ubuntu Muslim Edition, to a specific community's computing needs. Whereas the first installment focused on small-footprint distros, system-rescue Linux, and Linux flavors geared for archaic hardware, the second installment showcases the advantages of customizing both OS components and user-level software, focusing on firewall Linuxes, a Linux SAN/NAS appliance, two Linuxes for musicians, and the aforementioned religious flavors of Ubuntu. 'These distributions are outstanding examples of flexibility of the Linux OS,' Grehan writes. 'Hats off to the designers and developers who build these specialized distributions and make the fruits of their enthusiasm available to all.'

Apple released the Safari 4 Beta today. Features: Tabs on top. "Top Sites" 'Speed Dial' feature. "Smart" address/search fields. HTML5 Canvas. HTML5 Audio/Video (though no Ogg). Acid 3. CSS Animation/Gradients/Masks/Reflection. CSS Web Fonts. New "Nitro" Javascript engine - "Up to 4 times faster than Firefox 3.1". 'Native' look and native font rendering on Windows Vista/XP. I can think of only one thing: "Now witness the firepower of this fully armed and operational battle station!"

Whenever we're talking market share and Macs, it'll inevitably get late. There are different means of measuring market share, and different ways to interpret the resulting data, usually leading to heated debates about who is right and who isn't. Ars decided to take a look at the different methods of measurement and see what they mean.