A couple minor issues with apic and lapic.
In my case I bought a x86_64 system and installed F8 x86_64.
It was crashing hard (X frozen, would ping, but no ssh login) after a
few minutes of web browsing and file copy from USB to PATA (about 3 mb.)
Memtest86+ ran 24 hours with no problems.
CPU thermals on the low end.
Followed :
http://fedoraproject.org/wiki/KernelCommonProblems
The kernel arg "noapic" gets it stable.
The kernel arg "nolapic" makes it come up with no ethernet devices.
So for now it's noapic.
MOBO : MSI K9MM-V K8M800 AM2
MEM : 1Gx2 CORSAIR TWIN2X2048-6400
CPU : AMD A64 X2 4000+ 2.1G AM2
This has the VIA K8M800 chipset.
Linux box 2.6.24.3-12.fc8 #1 SMP Tue Feb 26 14:21:30 EST 2008 x86_64
x86_64 x86_64 GNU/Linux
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John