Upon resume from suspend to disk (hibernate) the sky2 ethernet driver fails.  This is a known trouble module in the kernel with many patches being enetered recently I believe.  This driver resumes properly on Ubuntu so perhaps a trip to their Malone Bug facility will provide clues as to a solution.

Here is the message(s) upon resume:

sky2 eth0: enabling interface
sky2 eth0: phy write timeout
sky2 eth0: phy write timeout
sky2 eth0: phy write timeout
...
And here is the message after "rmmod sky2" and "modprobe sky2" after resume:

PCI: Enabling device 0000:02:00.0 (0000 -> 0003)
ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 177
PCI: Setting latency timer of device 0000:02:00.0 to 64
sky2 0000:02:00.0: unsupported chip type 0xff
sky2: probe of 0000:02:00.0 failed with error -95

Well, the error on the last line above may actually be 96 instead of 95.  My copy-paste lost a portion.  Its one of those two numbers though.