fatfs v0.12b September 04, 2016:

- Improved f_rename() to be able to rename objects with the same name but case.
- Fixed an error in the case conversion teble of code page 866. (ff.c)
- Fixed writing data is truncated at the file offset 4GiB on the exFAT volume. (appeared at R0.12)
- Fixed creating a file in the root directory of exFAT volume can fail. (appeared at R0.12)
- Fixed f_mkfs() creating exFAT volume with too small cluster size can collapse unallocated memory. (appeared at R0.12)
- Fixed wrong object name can be returned when read directory at Unicode cfg. (appeared at R0.12)
- Fixed large file allocation/removing on the exFAT volume collapses allocation bitmap. (appeared at R0.12)
- Fixed some internal errors in f_expand() and f_lseek(). (appeared at R0.12)

doc/en/printf.html

@@ -39,7 +39,7 @@ int f_printf (
 
 <div class="para ret">
 <h4>Return Values</h4>
-<p>When the function succeeded, it returns number of characters written. When the function failed due to disk full or any error, an <tt>EOF (-1)</tt> will be returned.</p>
+<p>When the function succeeded, it returns number of characters written. If the function could not write the generated string to the file due to disk full or an error, <tt>EOF (-1)</tt> will be returned.</p>
 </div>