fatfs v0.07c Jun 21, 2009:

- Fixed f_unlink() may return FR_OK on error.
- Fixed wrong cache control in f_lseek().
- Added relative path feature.
- Added f_chdir().
- Added f_chdrive().
- Added proper case conversion to extended char.

doc/en/write.html

@@ -33,7 +33,7 @@ FRESULT f_write (
 <dt>ByteToWrite</dt>
 <dd>Specifies number of bytes to write in range of UINT.</dd>
 <dt>ByteWritten</dt>
-<dd>Pointer to the UINT variable to return number of bytes written.</dd>
+<dd>Pointer to the UINT variable to return number of bytes written. Return value is always valid after the function call.</dd>
 </dl>
 </div>