…in-Safari-Extension the Pinboard extension to paste any selected text into the "notes" field. (I tried implementing this myself, in a practically identical manner to the Pinboard extension, but with no dice - so copied/pasted, and hurrah, it worked. Apologies it's not a true fork, but hey-ho).
…s. Cleaning up that line fixes it and the extension works
The extension simply didn’t work for most sites that I visited when they used non-simple characters. Using encodeURIComponent (from the Delicious website) fixes this issue.