EFI firmware update doesn't show up?

Wondering why the EFI firmware update doesn't show up for me in Software update? My firmware is: MP31.006C.B03
Supposedly after the update its supposed to be: MP31.006C.B05
Does this mean that I don't need the update?

CapNemo wrote:
Thanks for all the replies. I guess the problem is that I haven't yet installed the Leopard Graphics update. Since everything is running so well right now I didn't want to mess with it.
So what's the story, should I or shouldn't I install the Leopard Graphics Update and the EFI Firmware update? I've never experienced the wake from sleep problems because I have Energy Saver set to "never" sleep.
It might be wisest not to, but then it's hard to say. The
firmware update might address some nasty issues we don't know
about. Or it might be targeted specifically at the reboot issue.
How can we know? There's very little information on the download page.
It's a gamble, sorry to say.
One thing: I'm not super convinced you'll need that graphics
update after the EFI update has been applied. It would be surprising
if Apple made the machines reliant on something not included with
the original install disks.
You might try this very risky (caution: possibly dangerous; at your
own risk only) thing: applying the graphics update and then manually
reverting it from a backup after installing the EFI update.
Note this though: the EFI update is essentially irreversible.
In a couple of months, graphics update 2 will likely be available, if
history repeats itself. You might wait until then, and take that risk
instead

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