I downloaded the release notes and have uploaded the pdf to this posting, let me know if you can download it.       
Hey there,does anyone have the release notes for Dell Enterprise Edition OS10.4.3.8 for the S5148F-ON?  The link here: does not load and shows "Access denied or just loops over and over again never showing the release notes. Thanks in advance.
PowerSwitch S5148F-ON 10.3.4.8 Release Notes