I've been using KDE 3.0 w/ Thai (set as secondary language during MDK9.0 install) without any problems. I've been able to read mails sent in Thai (even though I have English US as the primary language).

Ever since I updated to KDE 3.1 (and XFree 4.2.99), I do get Thai fonts but rendering has several errors. The 'dots' on top of characters appear as an arc.
Related question:
Is there a way to set which fonts should be used in the 'secondary' language?

My rpm versions are:

Any suggestions would be much appreciated.