Quicktime and XP / Vista 64 bit?

[Tiemo Hollmann TB]

Hello,

on the Quicktime site I didn't found anything saying about the compatibility
of quicktime with XP or Vista 64 bit. That looks for me, it is compatible.

But in the list archives I found a note of Ian, telling "With the exception
of QT on Vista 64-bit, which is no surprise as QT  
didn't work properly on XP 64-bit"
Since I don't have a 64 Bit machine I would be very interested, if there are
any experiences about QT on 64 Bit XP and Vista.
Also, if there are any new known bugs of Rev on 64 Bit.
Thank you
Tiemo