Comment 9 for bug 43393

I haven't seen a screenshot demonstrating the symptom. But I guess it's the same problem as I heard in local communities, which is caused by too high rank of TlwgMono font in fontconfig matching. That makes Thai text to always be displayed with Monospace font by default.

If so, it could be fixed by syncing thaifonts-scalable 0.4.5-2 from Debian Etch. In that package, I have provided fontconfig info so that correct Thai fonts are selected.