I tried it on my AMD Snow Leopard install and portal doesn't work, it just crashes... Any ideas why? says the error is:
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: 0x000000000000000d, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 QuickTimeH264.scalar 0x2bbc7c7d JVTCompEncodeFrame + 2940844

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GA-Z68XP-UD3: Lion 10.7.3, Windows 7 Professional 64bit SP1 and FreeBSD 9-RELEASE, Core i5 2500K @ 3.3GHz, 16GB 1333 Mhz DDR3 ram(Soon), 1GB GDDR5 Nvidia Geforce GTX 560 Ti, 2X 1TB Samsung F3 SATA HDDs, 1X WDC Blue 500GB HDD; Dell Mini 10v: Obsidian Black, 2GB DDR2 533MHz Ram, 1.6GHz Intel Atom N270, 120GB HDD, 6-Cell, Mac OS X Snow Leopard 10.6.8 Build 10K549