Flash Player Version 9,0,28,0 works with Safari 2.0.4 (419.3) OSX 10.4.8 on Intel MacBook Pro (Boot ROM version MBP11.0055.B03)
Flash Player Version 9.0.20.0 was incompatible with Safari 2.0.4 (419.3) OSX 10.4.7 on Intel MacBook Pro (Boot ROM version MBP11.0055.B03)
Update 2011-04-24 This is now a public beta from Apple.
If you are registered as an ADC member (go to http://developer.apple.com/ then to the ADC member site link to register for free), you can now download the Safari 4 Developer Preview.
This this is very fast and very compliant: 100/100 on the Acid3 test. (Firefox 3.0.5 scores 71/100.)
First Direct online banking now works fine (and fast).
The latest Universal Binary Flash Plugin (9,0,28,0) now works in Safari 2.0.4 (419.3) — see Flash Player Update
A Universal Binary Flash Plugin is available, but Shockwave is still PPC only. Solution: run Safari in Rosetta.
Download the latest version! (as of 20060910: 9.0 r20 for Intel; 9.0 r16 for PPC)