Meanwhile, I've been working a lot with the NOOK Color and noticed that it was mangling my headlines, putting hyphens in even though I don't want them, and even cutting off the end of words sometimes. This despite using the standard CSS hyphen controls that I explained in this article here in February.
The standard CSS for controlling hyphens is not currently supported by NOOK Color, but thankfully, there was a guy from B&N on Mobile Read who offered a solution. Non-standard CSS, but a solution nonetheless. He says you can add:
in order to force NOOK Color to use an older RMSDK which has a text engine which doesn't do hyphenation.
I added it to the rules for the headers in my book and it worked like a charm:
And it doesn't seem to have a deleterious affect in iBooks (or indeed, any effect at all):