hi guys.
i figure out it is a matter of php.
maybe socket_read causes error.
still i try to fix.
if your wp is located subdirectory.
ex} http://example.com/wordpress/
it may happen.
I solved this problem as follow.
edit profile-pic.php line 699
$path = profilepic_internal_cleanpath('/' . $profilepic_options['dir'] . '/' . $profilepic_displayoptions['filename']);
as
$path = profilepic_internal_cleanpath(get_settings('siteurl') . '/' . $profilepic_options['dir'] . '/' . $profilepic_displayoptions['filename']);
i think this is bug.