ping
How reliable are these sources?
Offhand, I'd say the idea is not likely. Few people have Vista yet, and I don't see sales catching on.
Why would Apple delay 10.5.0 for that, anyway? If BootCamp is ready for release, release it with the new OS, and say that Vista compatibility will come with the release of 10.5.1. No big deal, Apple releases new functionality with incremental updates all the time.
Apple's line thus far is that aside from releasing its dual boot application, it will leave the Mac OS/Windows compatiblity issue to third parties. If this rumor is true, it represents a remarkable shift in priorites, from "yeah, we tossed Boot Camp together for the die hards, whatever" to "Vista compatiblity is so important we won't ship Leopard without it".
Frankly, I never bought Apple's disinterest in running Windows native. Steve Jobs is famous for expressing disinterest in a project while feverishly at work on it (e.g., iPhone, Intel Macs).
If this rumor is true, I would not at all be surprised to learn that Leopard runs all flavors of Windows native at full speed on the Mac OS desktop, with all of the Mac trimmings. This would explain why Apple has locked all developers out of the secret features loop: it will pee in a lot of cereal bowls! (And also why Jobs did not outline such features last autumn when Microsoft could still tweak code to lock the Mac OS out.)
Of course, Vista could just be a convenient excuse to cover a schedule slip on another front...
It's been debunked by one source who called Apple:
http://weblogs.jupiterresearch.com/analysts/gartenberg/archives/2007/03/is_leopard_dela.html
Boot Camp modification to run Vista is a trivial change... it is already being done by individuals.
I'll Ping the list since its been posted... PING!
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And I doubt if there are any problems with it to hold it up for six months.
Atsiv we believe anything much is compatible with Vista to necessitate such a delay...