Hello everyone, I'm new. I'm sorry for my bad english but I really need your help. I've just bought a Tolino Vision 4 HD, and I'm using Calibre to organise all my epubs and convert them. The problem is that I can't use the index on a few ebooks... I mean, most of them work great, but others make the ereader very slow and they haven't got the TOC (even though I can see it on Calibre). My old PW can handle them perfectly. On Calibre, I compared a good epub with another one wich has issues...can you tell me the exact difference, so I can convert them properly? (I attached a screenshot)
Another strange fact is that I tried to open the epub on Sigil and then to export it to the Tolino's directory and it works.
Thank you,
Fabrizio