Font rendering (Thai): Thai city names are in ugly monospace font

[claysmalley]

Example: http://www.openstreetmap.org/#map=13/16.8140/100.2643

English	Native	Native (bitmap)	Mapnik
Phitsanulok	พิษณุโลก

Notice how some characters are horizontally squeezed or stretched to make the font monospace. This is readable, though it's particularly ugly and doesn't feel natural to read.

However, labels for Thai provinces seem to be working fine with variably-spaced letters (http://www.openstreetmap.org/#map=9/16.3188/99.5087):

English	Native	Mapnik
Changwat Kamphaeng Phet	จังหวัดกำแพงเพชร

Could we get a better font for Thai city labels? We seem to have one working for province labels.