White blocks while scrolling

I've tried to think of the best way to explain this and I cannot grab a screen shot of it (tried). Oh and sorry I don't have a shot of the next iPhone or a question when it'll be released.

In iTunes, Safari, & Firefox I have noted some odd behavior as far as page rendering goes. I'll have the screen size set to anywhere from 1269x963 to 1530x1385. These are just random measurments of typical window sizes from time to time. Clearly they vary.

When I am scrolling up and down white blocks appear, they're dynamic really, flickering even. What I tried to do was mimic the behavior so that it could be understood. I noticed this day one but almost figured that was just how things were. I haven't ever noticed this on my old PowerBook. The number and placement of such boxes varies. I think it's how pages are being rendered but I am not sure.

If this is an issue I'm outside my 14-day window to return but I am certain it can be fixed so I'm not overly concerned. But I want to ask anyway.

Code:

Here are the specs of my machine:
  Model Name:	mac pro
  Model Identifier:	MacPro3,1
  Processor Name:	Quad-Core Intel Xeon
  Processor Speed:	2.8 GHz
  
Memory (DIMM1 on Riser A & B contain the following)
  Size:	1 GB
  Type:	DDR2 FB-DIMM
  Speed:	800 MHz
  Status:	OK

Video/Display:
NVIDIA GeForce 8800 GT:

  Chipset Model:	NVIDIA GeForce 8800 GT
  Type:	Display
  Bus:	PCIe
  Slot:	Slot-1
  PCIe Lane Width:	x16
  VRAM (Total):	512 MB
  Vendor:	NVIDIA (0x10de)
  Device ID:	0x0611
  Revision ID:	0x00a2
  ROM Revision:	3233
  Displays:
Cinema HD:
  Display Type:	LCD
  Resolution:	2560 x 1600
  Depth:	32-bit Color
  Core Image:	Hardware Accelerated
  Main Display:	Yes
  Mirror:	Off
  Online:	Yes
  Quartz Extreme:	Supported
  Rotation:	Supported

Not knowing if my connection speed has anything to do with it, I'm posting the results from a speed test connected via ABES (wireless) through Time Warner.
Download: 6636 Kb/s Upload 470 Kb/s Latency 22ms

Finally, I can say that this behavior isn't repeated if I take a screenshot, open in preview, size the window to around 1000x800 and scroll like a madwoman.

Any feedback is appreciated, even if you just want to say good morning.

 

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A102 Safari/419.3)

thank you. I will see if anyone else has feedback but sometime next week I'll call Apple and see what they have to say.