Unrecoverable system hangs when accessing website

Beginning last night, I've been experiencing a system hang when accessing the Amazon website using Safari 7.1.7, and I can't figure out if the problem is the site or my Mac. The hang is reproducible and essentially bricks my Mac. The only way to recover is to hold the power button and force the Mac to power off.

The system hangs a few seconds after the site loads. Here's what follows:

Everything on the screen is frozen, except the cursor.

The cursor is frequently responsive, but is otherwise useless. When the cursor isn't responsive, it disappears from the screen.

Sometimes when the site loads the banner across the top of the webpage just below the dark navigation ribbon is a jumbled mess of colored confetti.

The entire screen "blinks" black for a fraction of a second, every few seconds.

The system log is showing the following lines multiple times, and not always in the this order (note: timestamps removed):

kernel[0]: NVDA(Video): Channel exception! exception type = 0x23 = Video Engine Error (MSPDEC Error)

kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = DMA Engine Error (FIFO Error 8)

kernel[0]: NVDA(OpenGL): Channel timeout!

com.apple.WebKit.WebContent[641]: VADriver: Channel timeout (kernel), ch = 3

com.apple.WebKit.WebContent[641]: VADriver: Channel timeout (client), ch = 3

kernel[0]: process com.apple.WebKit[641] caught causing excessive wakeups. Observed wakeups rate (per sec): 4622; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 46779

I've tried the following, but none solves the problem:

Logging in to a different user account (including the Guest account)

Disabling all Safari Extensions

Safe Boot

Reinstalling Mavericks using Recovery

I ran Malwarebytes Anti-Malware (formerly Adware Medic) but it found nothing. I also booted from the original gray system disc and ran Apple Hardware Test, but it reported no problems.

I have found two workarounds: disable Javascript in Safari, or use Firefox (and Firefox works with Javascript on). I should also mention that

booting the Mac into Snow Leopard and accessing the site using Safari 5.0.6 doesn't show the problem. These lead me to think that the website has a compatibility problem with Safari on Mavericks, as of last night, and if so, I'm curious if anyone else is experiencing this problem. I've tried several other websites and I'm not seeing the problem elsewhere. I have sent an email to Amazon customer support but haven't heard back from them as of yet.

Any feedback would be most appreciated!

Eric

OS X 10.9.5, Safari 7.1.7, Macmini3,1