Fix the fix of the fix (yes, really!) Also, Hervé, I'm not really convinced you need to upcase the first letter in the RtlPathTypeDriveAbsolute case. Can you recheck that (and if unneeded, remove the commented line)?

svn path=/trunk/; revision=65535

reactos/lib/rtl/path.c

@@ -487,7 +487,6 @@ RtlGetFullPathName_Ustr(
 
     PCUNICODE_STRING    CurDirName;
     UNICODE_STRING      EnvVarName, EnvVarValue;
-    WCHAR CurDrive, NewDrive;
     WCHAR EnvVarNameBuffer[4];
 
     ULONG  PrefixCut    = 0;    // Where the path really starts (after the skipped prefix)
@@ -615,9 +614,8 @@ RtlGetFullPathName_Ustr(
             ASSERT(FileNameBuffer[1] == L':');
             ASSERT(IS_PATH_SEPARATOR(FileNameBuffer[2]));
 
-            NewDrive = RtlUpcaseUnicodeChar(FileNameBuffer[0]);
-
-            Prefix = NewDrive;
+            // FileNameBuffer[0] = RtlUpcaseUnicodeChar(FileNameBuffer[0]);
+            Prefix = FileNameBuffer;
             PrefixLength = 3 * sizeof(WCHAR);
             Source += 3;
             SourceLength -= 3 * sizeof(WCHAR);
@@ -628,6 +626,8 @@ RtlGetFullPathName_Ustr(
 
         case RtlPathTypeDriveRelative:      /* c:foo   */
         {
+            WCHAR CurDrive, NewDrive;
+
             Source += 2;
             SourceLength -= 2 * sizeof(WCHAR);