Updated to 2.7.2 and try now to save an edited entry with a file upload field (which is empty) that troubled in 2.7.1.
Get this error message:
Fatal error: Call to undefined function get_bytes() in /home/...../expressionengine/libraries/Filemanager.php on line 1949
what to do?
edit: as soon I give an image to upload to the file field, it works.