The ID should never generate a URL with a % in it. It should have been replaced by the white/blackPrefix when it is building the image name. This is a feature for allowing specification of another folder than graphicsDir; with a pathname the color prefix would not go in front.
Note that only the betzaNew.js script scales the piece images. Bob's Diagram used betza.js. I took the liberty to change that, and now it displays correctly in View mode. Not in the comments listing, though, because there are other IDs there behind it that use betza.js.
The ID should never generate a URL with a % in it. It should have been replaced by the white/blackPrefix when it is building the image name. This is a feature for allowing specification of another folder than graphicsDir; with a pathname the color prefix would not go in front.
Note that only the betzaNew.js script scales the piece images. Bob's Diagram used betza.js. I took the liberty to change that, and now it displays correctly in View mode. Not in the comments listing, though, because there are other IDs there behind it that use betza.js.