Work Around JavaHelp Limitations
Summary
The JavaHelp 2.0 format does not recognize several of the CSS properties which are available in the ePublisher Style Designer. To reduce the confusion, those settings should be inactive when the chosen format is JavaHelp.
Detailed Description
I don't remember all of CSS attributes currently supported (or not supported). There is a list here, but it might be a bit outdated.
Use Cases
This particular report was prompted by the realization that named colors are not supported, so something like "CornflowerBlue" will just appear as black in the output JAR, as described by David Shaked in Support Case #4763.