Google has brought to Linux the beta version of its new Picasa 3 software for image editing, cataloging, and uploading.

The new release catches the open-source operating system up with Windows, which got the Picasa 3 beta one month earlier. There’s still no word about a Mac OS X version, although Mike Horowitz, Google’s Picasa product manager, told me earlier that “Macs are important to us…We’re always looking for new ways of making sure our users are happy, so it’s something we’re looking at.”

The new version adds a retouching tool, automatic synchronization of photos on the PC with those stored at Google’s Picasa Web site, and a collage mode that lets people combine numerous snapshots into a poster-size collection, Google programmer Lei Zhang said in a blog post announcing the new version. The new version also is faster, he added.

However, it does lack the Windows version’s movie maker feature that can turn photos into a slideshow with a soundtrack that can then be uploaded to YouTube.

The software runs using Wine and an open-source software layer that translates a program’s Windows instructions into commands for Linux instead.

Bowing to continued demand, Microsoft has again extended the life of Windows XP.

Three months after Microsoft stopped selling new copies of Windows XP, the software remains a top seller on Amazon.com.

Although the largest PC makers can’t sell XP anymore (except for ultra-low-cost machines), they can sell Vista Ultimate and Vista Business machines with XP discs in the box, or even Vista machines that are “factory downgraded” to Windows XP.

That option was supposed to go away early next year, as Microsoft was going to stop supplying Windows XP media after January 31. However, the company now says it will offer the discs through July 31, giving the option a six-month extension. (Update: PC makers will also be able to sell the factory downgraded machines online as well.)

In a statement provided to CNET News, Microsoft tried to put the best face on the move.

“As more customers make the move to Windows Vista, we want to make sure that they are making that transition with confidence and that it is as smooth as possible,” Microsoft said. “Providing downgrade media for a few more months is part of that commitment, as is the Windows Vista Small Business Assurance program, which provides one-on-one, customized support for our small-business customers.”

CEO Steve Ballmer said on Thursday in France that 180 million copies of Vista have been sold, but he noted that businesses continue to move at their own pace. When asked about whether companies should move to Vista or wait for Windows 7, even Ballmer said it depends on the business.

Panda Security released its report for the third quarter stating that adware is responsible for one third of all new malicious software. In particular, the security company cited increased use of fake antivirus scanners.

The fake scanners typically report a computer infection and suggest downloading an application to remove the malware. Once downloaded, the scanners then ask computer users to purchase the application before it can remove an infection that never really exists. The goal of these attacks is financial gain.

In addition to seeing increasing amounts of adware, Panda Security reported that Trojan horses account for almost 60 percent of all malware samples analyzed between July and September. Worms and spyware, once the bane of every computer user, were nominal during the period at only 4.53 percent and 2.93 percent respectively.

Google Inc and Yahoo Inc have decided to delay implementing a controversial search advertising partnership, Yahoo said on Friday.

“The companies have agreed to a brief delay in implementing this agreement to continue our ongoing discussions with the (U.S.) Department of Justice,” Yahoo said in a statement. “We have had discussions with regulators and look forward to responding to their questions about this agreement.”

Google issued a similar statement.