I think I'll follow that advice, Jellby. At least until there are more universal and cross-platform means to solve this problem. I'm looking forward to ePub3 mentioned by Peter Sorotokin and hope that this problem can be solved then. When can I hope that ePub 3 can be released?
I have just a few more questions and some minor decitions to make, and then I'm finished with converting my first book to ePub

-<i> or <em>?
I have some words in my book that are emphasized with italics, and I am considering changing marking to <em> for these instead of <i> as I have used until now. My little problem is: should I replace all i tags with em, and where is it semantically correct to use <i>? So far I have used <i> to make emphasized dialog, mark up sitations in text (a letter), mark references to book titles (he has also written <i>title</i> (...)) and styling times (at <i style="font-size:0.8em;">11:49</i> we were finished (...))
-<strong>
Where would it be appropriate and semantically correct to use strong? Strong is a bit heavier emphasize than em, if I understand correctly?
Ellipsis
Is it best to use three periods, or … (the unicode for &hellip

?
I'm sorry to trouble the forum with trifles like these, but I have read quite a bit at the internet, and have read many contradictory statements that I decided to ask the experts about this matter