As I started doing a click-for-click recreation to share with you... I stumbled upon something. It appears that the problem is not with the length of the entry, but with the contents themselves! Here is an example...

Code:
2 Bottles for <strong>$47.90</strong> / $23.95ea <span style="color:white; background-color:green;">##Save $8.00 </span>
This is over 64 characters and fails when I try to edit a specific product's entry in the Attribute Controller.

However if I remove the span tags and just use regular text it works fine. The problem appears to be due to the span tag...ugh The strong tag works fine.

The customer I have wants to have the formatting that is contained within those span tags.

Any suggestions? I'm at a loss.