I have been tearing my hair out trying to figure out why the Guide no longer works and I was very excited to see your post with a fix. Thanks for all your hard work. Sadly, after changing all the html files as directed, the fix didn't work. I'm very comfortable working in html and editing files but for some reason the Guide still doesn't work for me when I hit Update. I even tried coding the guide information into the ncx file but that didn't work either.
Any idea what I might be missing? Any help would be greatly appreciated.