[Inkscape-user] New Cairo PDF Export mangles font kerning (OS X)

I have an old map project that I've updated for the new year with Inkscape .46 - I then send it off to the printers as a PDF. However this time the old method for PDF export has been removed and replaced by cairo. It works, but the font kerning is all wrong - the letters seem to be spaced too far apart.

This is much worse for small font sizes than for large font sizes - could it be an issue of precision?

Here are some pictures of a magnified part of my document.

PDF: http://img132.imageshack.us/img132/2406/pdfdv8.png SVG in Inkscape: http://img512.imageshack.us/img512/3523/svgnk5.png

I never had this problem with .45's PDF export - can I replicate this behavior in the new version?