I haven't had very much problems with ADE, but from wha I have seen so far, I believe, that most of the bugs that everyone mentions appear on handheld devices. And I think the majority of the readers uses the ADE parser. At least Sony and Hanlin (and all it's clones like Bebook) uses ADE.
One bug that I experienced is this: I have this one ebook. There are 3 "special" (hebrew) characters in the ebook. I found them in the unicode table so I just added them to my ebook. I cheched my base file (the html file) with Firefox and the hebrew letters showed up. Then I converted it with Calibre and looked at it with the Calibre ebook-viewer and the hebrew letters showed up. Then I copied the epub on my ebook and looked at it - and instead of the hebrew letters, I ended up with "?". And as far as I know, this is one of the bugs - no full support of all unicode characters.
|