mac: screen('WaitBlanking') problem

Hi,

I have a problem synching with my monitors. I have ATI Radeon 8500 Pro
driving 2 CRTs; I am running MATLAB 5.2.1 from OSX. When I query the
refresh rate with screen('resolution'), the value in res.hz is same as the value
set in system preferences. When I query the rate with screen('framerate'), the
value is always 60 Hz. WaitBlanking appears to operate based on 60 Hz
regardless of what the actual refresh rate is.

What should I do about this?

I'd be happy to provide more information if necessary.

Thanks very much,

Alex