It seems to be a unicode cleansing problem. Just like Rachnera noted.
I may be completely wrong (i'm an english speaker and, therefore, have little experience with different character sets) but here goes nothing:
According to the thai character list (according to unicode): [
unicode.org]
http://unicode.org/charts/PDF/U0E00.pdfWe can only have 0E19 0E36, 0E19 0E49 or 0E19 0E36 0E49. I can see these characters correctly when i input the binary representation into my unicode terminal but when i paste exactly the same input into the forums i get the following:
นึ
นึ
นึ*(i forced my browser font to display the characters correctly in the input box but the result is what we all see above)
Forums often have user content cleansing features, i bet my hentai collection that the cleansing is stripping any unicode characters longer than 2 bytes.