I just upgraded to glib-2-4 from CVS, was previously using glib 2.4.1, and I can
no longer open files containing non-ASCII characters in GIMP 2-0 on Windows XP
(using Swedish locale). This seems to be caused by the changes made in bug
#140532. More specifically, g_unescape_uri_string still checks that the
unescaped string is UTF-8, which now fails.

For example, when I try to open a file named C:\Robert\WÖ.xcf  (there is an
umlauted O before .xcf in case you don't see it) in The GIMP, the file cannot be
opened. g_filename_from_uri is called with the string
"file:///C:/Robert/W%D6.xcf", and that is not UTF-8 after it has been unescaped
so it returns NULL.

Everything seems to work fine if I remove the UTF-8 check in
g_unescape_uri_string like this:

Index: glib/gconvert.c
===================================================================
RCS file: /cvs/gnome/glib/glib/gconvert.c,v
retrieving revision 1.54.2.1
diff -u -r1.54.2.1 gconvert.c
--- glib/gconvert.c     8 Jun 2004 03:31:34 -0000       1.54.2.1
+++ glib/gconvert.c     25 Jul 2004 14:46:27 -0000
@@ -1401,7 +1401,7 @@
   g_assert (out - result <= len);
   *out = '\0';
 
-  if (in != in_end || !g_utf8_validate (result, -1, NULL))
+  if (in != in_end)
     {
       g_free (result);
       return NULL;