I tried creating a font using this method and it turned out reasonably well, but I have some problems. Maybe some of you who have tried this can offer some advice. I am a complete newb with Inkscape.

First, carriage returns show up as big black boxes. I can get around that by selecting all the carriage returns and changing the font to a conventional font, but that is a pain. Is there a way to get rid of the big black box?

Second, I realize now that I should have mapped all the unmapped uppercase glyphs to their lowercase counterparts. Since I didn't do that, the font reverts to the default whenever I accidentally hit an upper case for a glyph that was not set. Is there any way to copy the glyphs for a lower case to an upper case, without re-importing, re-tracing, etc?