CS3 exports into Epub what was in the base imported document for styles. If you didn't import anything, it strips pretty much any indesign-invoked styling right out.
CS4 does have a coupla options when exporting epubs over CS3 - it's on the main menu instead of a submenu, and there's an additional button now for CSS Styles:
Base for CSS Styles
1) Local Formatting
2) Defined Styles
3) Style Names only
The [ Defined Styles ] is a step in the right direction. Not all style parameters seem to get exported when using defined styles - despite the xhtml file being exported having a <justify> tag, everything seems to be flush left in DE. Haven't figured that one out, yet.
The Epub from CS4 is being reported by Calibre's Epub viewer as having DRM, (and therefore doesn't open) but I can't find where that happens in CS4 yet.
Oh, also, theres a
Format for EPUB Content
1) XHTML
2) DTBook
set of output options now, too. For whatever that does.
It still seems mostly not-quite-intuitive with CS$ (oops, 4), and I've had nowhere near enough time to play with it yet.
Big Quote from the Big House itself:
"InDesign CS4: EPUB export with NIMAS-ready DAISY XML
We squeezed EPUB export into InDesign CS3 before the final IDPF standard was approved, when even the name of the format was still in doubt ( thus the feature name: "Export for Digital Editions"). The just-released InDesign CS4 takes EPUB support to a whole new level, adding embedded font support and TOC generation (which we had made available as a separate update after CS3 shipped), as well as floating anchored images, option to emit CSS for local (non-style-driven) formatting, and improved mapping of TOC structure to XHTML heading levels. But the biggest feature by far is the new option to choose DTBook (aka DAISY XML) content within EPUBs, compatible with the NIMAS standard that has been mandated in the U.S. for providing access to K-12 instructional materials for the visually impaired. Our lead tools developer writes about the new features here, in our digital publishing tech blog. A very important next step on the client SW side is enabling "screen reader" support for DRM-protected eBooks, something we are committed to doing ASAP."
(from
http://blogs.adobe.com/billmccoy/200...gn_cs4_ep.html )
(And another maybe-relevant link:
http://blogs.adobe.com/digitaleditio..._cs4.html#more )
-bjc