Hi, I'm from Mexico and I was having issues converting my ebooks to plucker format, most of all with accents (á é í..) and the ñ character. After trying many encondings I found one that shows ok on the palm viewer, the steps I follow:
copy my pdf text and paste it on open office writer.
save as Text Encoded (check Edit Filter Checkmark)
Click save and a dialog to select encoding appears
Select
Western Europe ISO-8859-1
save
Then just type from a terminal:
$plucker-build mytext.txt>mytext.pdb
I know it has is cons because you loose all the formatting but since I read novels the most this is not much trouble for me, hope this helps anyone.