Thanks, that's a bug in the code that helps wrapping labels at the right
position for the icon view

nautilus-icon-canvas-item.c has this code

"
#define ZERO_WIDTH_SPACE "\xE2\x80\x8B"

                for (p = text; *p != '\0'; p++) {
                        str = g_string_append_c (str, *p);

                        if (*p == '_' || *p == '-' || (*p == '.' && 
!g_ascii_isdigit(*(p+1)))) {
                                /* Ensure that we allow to break after '_' or 
'.' characters,
                                 * if they are not followed by a number */
                                str = g_string_append (str, ZERO_WIDTH_SPACE);
                        }
                }"

it seems like the "zero width space" is what is creating the issue, I'm
unsure why that's happening though.

One bug I can see is that the code is iterating over char types, and an
utf8 non ascii glyph might not fit in a char, so it could insert value
in the middle of an utf8 sequence and corrupt it, but that doesn't seem
to be what is happening there since the "weird" glyphs are added after
"_" and "."

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https://bugs.launchpad.net/bugs/986008

Title:
  Strange character showing in file listing in Nautilus in some views,
  for Thai language file names

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