This now seems to be working, in that the selected file can be successfully downloaded.
But, for each firmware release there's supposed to be a Firmware zip file, and a separate Release Notes pdf file. For the most part, for each firmware release only the Firmware file - or only the Release Notes file - is available. Thus, the fix is not yet complete. Depending on your needs, though, you might find what you want:
code:https://extranet.enterasys.com/downloads/Pages/WirelessControllers.aspx
More to follow here, starting in about 14 hours (my work day). In the meantime, the Service Desk is still working on it - and I apologize for the inconvenience.