Phoronix compare the performance of ATI's drivers under Linux and Windows Vista:

Since AMD introduced their new Linux display driver last month, we have published a number of different articles looking at the Radeon performance across their different GPU product generations. This ATI/AMD Linux driver testing and exploration continued this month with the release of the 8.42 driver, which finally introduced AIGLX support for the fglrx driver. One area though we haven't yet analyzed is how their official Linux driver now compares to their much-optimized Windows Catalyst driver. Today, however, we will be looking just at that as we compare the ATI Radeon HD 2900XT 512MB performance under Linux and Microsoft Windows Vista.

 The problems with URI protocol handlers that are registered unnecessarily and with little thought given to security are not just limited to Windows, researchers say

By Robert McMillan, IDG News Service, Info World
October 15, 2007

This week Microsoft said it would patch Windows to reduce the risk of a new kind of Web-based security vulnerability, but security researchers say that other operating systems are probably at risk too. In fact, Nathan McFeters, one of the researchers who has been studying the problem most closely says he hopes to present more details on how other Unix-based operating systems like Linux and Mac OS X may also be susceptible to what are known as URI (Uniform Resource Identifier) protocol handler flaws at the Toorcon hacking conference, being held next week in San Diego.

Patent holding company targets Linux, files lawsuits against Red Hat and Novell
ARS Technica
By Ryan Paul | Published: October 12, 2007 - 08:42AM CT

Patent holding company IP Innovation has filed a patent infringement suit against Linux distributors Novell and Red Hat. The patent, which describes a "user interface with multiple workspaces for sharing display system objects," dates back to 1987 and originated in Xerox's PARC labs.

IP Innovation seeks damages and injunctive relief. "Red Hat's and Novell's infringement, contributory infringement and inducement to infringe has injured Plaintiffs and Plaintiffs are entitled to recover damages adequate to compensate them for such infringement, but in no event less than a reasonable royalty," reads the complaint.