One more tidbit, FYI...
The Snow Leopard installer guts /Library/Receipts/BSD.pkg (leaving only an empty folder) so that pre-Snow Leopard versions of Disk Utility think there's no OS on the disk.
Hate to bust that theory, but i first noticed that BSD package was gutted sometime in 2008. Here is my (Leopard 10.5.8) rendition of that item:
$ ls -laR /Library/Receipts/BSD.pkg
-rw-r--r-- 1 root admin 0 Nov 29 2007 /Library/Receipts/BSD.pkg
It's an empty
file!!!
[perhaps that was something Leopard did to distract Tiger?]
Same output as what I posted, except for spelling out 0/0 as "root wheel" and omitting the 32-bit CRC checksum.
>>> /Library/Receipts/db/a.receiptdb is no longer being updated.
Okay... but just for grins, please run it [lsbom|grep] on the old
/Library/Receipts folder. If anything relevant [recent] pops up, post back. Other than that, mount the 10.6.2 dmg and poke through that package [with Pacifist i suppose, unless expanding the whole thing into /tmp sounds tempting]. A match to that e5af66d28074b92ea70f4154339ece31e905e64b digest must be
somewhere. 
OTHER THAN MY POST
#5855 THAT IS
<e5af66d2 8074b92e a70f4154 339ece31 e905e64b>See that? -- Your current "Snow Leopard" ARDAgent is identical to the one i have from 10.5.8 !!!
-- so what is that telling us?
-- do you guys have the right ARDAgent or not??
-- if so, how could Snowy *
not* know that???
[if DURP can't get this stuff right, should we trust it for *anything*?]
