diff -r e8d89503f061 Lib/idlelib/AutoComplete.py
--- a/Lib/idlelib/AutoComplete.py	Sat May 26 20:44:45 2012 -0400
+++ b/Lib/idlelib/AutoComplete.py	Mon May 28 16:36:29 2012 -0500
@@ -126,11 +126,13 @@
         if hp.is_in_string() and (not mode or mode==COMPLETE_FILES):
             self._remove_autocomplete_window()
             mode = COMPLETE_FILES
-            while i and curline[i-1] in FILENAME_CHARS:
+            while i and ((curline[i-1] in FILENAME_CHARS)
+                         or ord(curline[i-1])>127):
                 i -= 1
             comp_start = curline[i:j]
             j = i
-            while i and curline[i-1] in FILENAME_CHARS + SEPS:
+            while i and ((curline[i-1] in FILENAME_CHARS + SEPS)
+                         or ord(curline[i-1])>127):
                 i -= 1
             comp_what = curline[i:j]
         elif hp.is_in_code() and (not mode or mode==COMPLETE_ATTRIBUTES):