It seems that the process used to generate the title attributes for the image links on the Stack Exchange store encodes an already-encoded string, leading to situations like this:
where the title attribute looks like the following:
title="Stack Exchange Pens — &nbsp;Got some serious writing to do?&nbsp; Get..."
We all know that Serious Writing™ necessitates spaces that don't break under pressure, but it'd be nice if they were a bit less intrusive. In this particular situation just removing the extra spaces it's trying to preserve from the main product description would work, but I imagine it might be a more general issue.