"XFree86 4.0.1 offers a mass of improvements and bug fixes
along with a lot of cleaning of the code in XFree86. While this
upgrade may not solve all your troubles, it is helping XFree86 get
one step closer to being the ideal platform for a 3D, as well as a
2D user. ... Just as there was in XFree86 4.0, 4.0.1 offers
many enhancements over its predecessor. Recommended reading is
XFree86 4.0, which covers the basic improvements and enhancements
added to XFree86 4.0 from 3.x."
"First things first. SPARC support has been greatly enhanced.
...IA64 has also been updated along with BSD/OS support. If you're
a user out there with Lynx/OS, XFree86 now loves you and now fully
supports Lynx/OS. 4.0.1 has also added preliminary support for MIPS
processors, which gets MIPS users one step closer to cutting edge.
Although... promising, there is no X Server support for MIPS
"Since XFree86 4.x is still in its infancy, there is still much
work to be done. If you really rely on a properly working X Server,
you may want to shy away from 4.x until it makes it up to version
4.1 or 4.2 and all the compatibility issues are worked out. ... So
is 4.0.1 right for you? NVidia users shouldn't exactly feel a huge
need to jump, unless they'd like to gain a few FPS. 3dfx Voodoo3
users may be split, depending on what you use and how intensively
you use your 3dfx card's 3D capabilities. On the other hand,
Voodoo5 users have no other choice than version 4.0.1, since
Voodoo5 was just recently introduced. ATI Rage 128 users will
definitely want to jump at 4.x, just as Matrox users will."
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