Freakie since you seem to be a tech geek at heart you should google search hdmi 1.3 standard when you get a chance. You will find a complete list of specifications on the 1.3 standard , its very interesting. You may even find a bit of info on the 1.4 standard that will be implemented in the future.

When you were having issues with your old hdmi cable I think it was most likely because of the 240hz refresh rate. Refresh rate, contrast ratio,"deep color" etc. are some of the reasons why the standard keeps being updated. You most likely had a 1.2 standard cable before which couldnt handle the 240hz. The fluid motion on the 240's is amazing, you have a very very nice display