Editing Specific Prices

[kierweb]

Anyone else having this issue (in 1.7.6.x) ... if you click on the "Pencil" on a Specific Price to edit it, instead of getting a "modal box", all I get is a dimmed screen and no modal box.   If I enter the ajax url directly into the browser, to see what content should appear in the modal box, all I get a is a blank page, which means the issue is with the ajax url NOT the modal box.

This is happening in a few of my sites including a 1.7.6.5 and 1.7.6.8 website.

Any ideas?