File Upload Bug for Thai Language

[eluser]DominixZ[/eluser]
I found bug that when I upload my thai name pic with File Uploading Class

It will convert from this

รูปภาพตัวเอง.jpg

to this

เธฃเธนเธ›เธ_เธฒเธžเธ•เธฑเธงเน€เธญเธ‡.jpg

and in the dabase will be

รูป

I know the solution for this (set 'encrypt_name' to TRUE) but I want it to not encrypt my file name. How can i fix this bug? Help me plz.