OSX PTB 1.0.50 error in DescribeComputer

Hi,

Here is a small bug to add to the "to do" list.

DescribeComputer reports a strange CPU clock frequency and 2.00 GB ram
instead of the correct 2.5 GHz and 4.00 GB ram reported by "About This
Mac".

>> DescribeComputer
*********************** David Jones on Hoodoos ***********************
Dual-CPU Power Mac G5 at -1794967296.00 Hz, Mac OS 10.3.8
Model Type "PowerMac7,3" with 2.00 GB RAM, bus clock 1.25 GHz
Psychtoolbox 1.0.5, 11 April 2005
MATLAB 7.0.4.352 (R14) Service Pack 2
QuickTime 6.5.2


... Also, I noticed there is no "DescribeScreen" as there was in OS9
PTB 2.55
I presume a version of that will eventually appear in OSX PTB.

-- David Jones