Originally Posted by John F
That's correct. Although there may have been a firmware change, I doubt it. I've always had troubles with footnotes in sideloaded epubs.
Who knows what is going on. They may both be epubs, but my understanding is that they are using different rendering engines, the GUI is different, ...
Yep, that's my mean reason to use the Calibre Kobo TouchExtended driver.
For standard epubs the Adobe Digital Editions renderer is used, and as you found out (as did I) it handles footnotes very
badly; I succeeded in getting to the note exactly once, instead of getting the normal touch screen action. For Kobo epubs they use the ACCESS renderer, which does it very nicely with a preview popup without fail.
As I read lots of non-fiction (which tends to use footnotes extensively), I switched to kepubs (a conversion which the TouchExtended driver can do on the fly when sending ebooks to the device if you want it to).