All right, I have a new system
These books have been giving me more trouble lately, not sure why. And using Neo Office to generate an HTML file has been resulting in extra line breaks. So, on a mac, here is what I have been doing:
1) Run the macro to extract the html from the secure file
2) Open in Firefox, select all text, paste into Neo Office as unformatted text
3) Save as RTF
4) Open RTF file in Pages, turn on search for invisibles
5) Search for 3 paragraph marks, replace with 2
6) Save again as RTF, Select all and copy
7) Open Komposer (web editing program)
8) Paste in the RTF text
9) Give a final once-over, save as HTML
10) Import into Calibre, edit metadata, convert to LRF
Kovid says I could probably convert the exploded file straight to epub and not get the line spacing issues and centering issues I get with LRF. Have not tried that yet.