Sorry, when you said that you saw the "Config file not found." error in Safari, I thought that the problem might have been the local viewing issue noted in the forum thread I linked to.
On further investigation, it looks like the problem is with the use of double-quotes in some of your linkURLs (in your gallery's 'conffig.xml'; file), e.g.:
linkURL="Dunes II, oil on board, 32"H x 48"W"
The double-quote after '32' is closing off the linkURL's opening double-quote and the text after the double-quote is breaking the XML syntax.
I get an appropriate view of the intended gallery except that there are only 7 image thumbnails shown.
7 thumbnails are displayed as the first error in the XML file appears in the data for the 8th image.
A linkURL is intended to be a URL (either relative or absolute) and the link is used when the visitor clicks the Open Image button or the Download Button. (If an image does not have a custom linkURL associated with it, then Juicebox will, by default, use the imageURL instead for the Open Image button and the Download button.)
Your linkURLs are not actually links (so your Download button will not work) and, even if your linkURLs were valid links, they should not really contain double-quotes. (Stick to web-safe alpha-numeric characters for URLs and all should be well.)
Just deselect the 'Link URL' checkbox (in the 'Image Info' control panel) and that should hopefully fix your problem.
(Thank you for providing all the files and information that you have. It has certainly made troubleshooting your problem that much easier. Initially, I opened your gallery's XML file in a text editor and missed the issue. It was not until I opened your gallery's XML file directly in a browser that I saw the problem.)
My Juicebox-Pro juicebox.js file appears to have version 1.5.0. Is this a problem. All
If you like, you can upgrade to the latest version (v1.5.1). Upgrades are free within the same major version number and download links always point towards the latest version (rather than the version you purchased).
Full instructions for upgrading can be found here.
Incidentally, I've removed the link to your 'juicebox.js' file. We don't want to make it easy for non-registered users to download Pro files (even though it's an old version and a single Pro file out of context will be of little use to anyone).
I appreciate you uploading so many files for troubleshooting, though. Thanks!