Linked by Eugenia Loli-Queru on Sat 1st Nov 2003 19:40 UTC
FreeBSD Robert Watson posted another bi-weekly version of the FreeBSD 5.2 open issues list, slightly restructured. At this time, there are four "show stopper defects" listed: panics when building ata-raid arrays, ATAng crashdump causes disk corruption, pipe/VM corruption on Alpha, and lingering PSE instability. There are only 5 issues left of on the "required features" list: KSE support for sparc64, KSE support for alpha, Fine-grained network stack locking without Giant, MAC framework devfs path fixes, and ACL_MASK override of umask support in UFS.
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4.x is the stable branch (production use). This is if your playing it safe.
5.x is the new technology release. This is the bleeding edge of FreeBSD.

4.x and 5.x both support SMP or multiprocessor. There are enhancements to the 5.x for SMP (and more).

Depends on your view point on which on you should use. If you have 1 PC or Server and you can afford to have some bugs to work out (go 4.x). If you want to be on the edge and test new features or get support for hardware that doesnt exist yet in 4.x, then you should use 5.x.

Hope that answers your questions.

PS: sign up for some of FreeBSD mailing lists. You will find some friendly support. Also, the 4.x vs. 5.x questions have been asked. You may also search through the archives. Very helpful if you ask me.