Don't know if any of my observations will be helpful, but here goes.
As I noted before, my update using the Dashboard went OK although after the automatic reboot, the Dashboard did not come up again. Access to the files on the MBL seemed normal. I don't use remote access or media serving, so I can't comment on those functions.
After about a day, I rebooted everything and discovered that the Dashboard was still somewhat fundtional, but incredibly slow and somewhat unreliable. The main menu would take 5-8 minutes to load. Selections off the main menu would take 3-4 minutes to load. Once on a submenu screen, however, it seemed to work normally.
I waited another day and did note that Power Savings still seems to work. At least the LED was blue when I first observed it after a couple of days of non-use. Dashboard loaded in about 5 minutes or so. Settings menu option took 4 minutes. I even went to the Update option and did an update check which seemed to work normally. It took about 2 minute for it to tell me that my software was up to date.
I then tried to load Shares menu item and it came back, but with a blank screen. I repeated this and it came up correctly in 3-4 minutes. I tried going back to the Settings menu and it failed with a #30001 error. Something about the network timing out. I repeated the Settings menu selection and it loaded successfully in about 3-4 minutes.
So in conclusion, nothing for me has really changed. This latest firmware update only seems to make the web UI very slow and somewhat more unreliable. I guess the only encouraging thing is that since the web UI does work somewhat, there is the potential to get this problem, whatever it is, corrected with another update.
Just to add, I have enabled SSH and used PuTTY to log in and look around. I'm no Unix/Linux user, but I have some experience with command line computing. I looked at the etc/hosts file and that IP address was on the first line. BTW, can somewhat tell me what text editor to use, and what those commands might be? I'm an old VMS/EDT user...