I've created a small tester ebook to show some problems with vertical space. You can download it from
http://www.squirrel.nl/pub/xfer/tester-20120221.epub .
When shown in Cool Reader, with "Enable document internal styles", the vertical space settings (margin-top) for the paragraphs are not honoured. In the "default paragraph settings", all settings are set to "-" where possible.
May I assume that this is a bug or am I overlooking some extra setting?
I'm running CR 3.0.55-32 on Archos 10.1 IT (UrukDroid 1.6.2).