I've updated the srfi-122 document to correct the discussion about separable transforms and Haar wavelets.
In doing so, I took the opportunity to refactor and simplify the code in that section of examples.
Thank you very much. Since these changes aren't fixes to errata, I haven't incorporated them into the final document. However, I've added a note pointing to your message at the bottom of the Status section. That way, readers will be able to find your latest work.