When we upgraded our HP Switch E5406zl(J8697A) from K.15.05.0002 to K.15.07.0008 it DID "Hang" (as warned by the download page), Power off/on did bring the switch back online, however our simple 6 character (all lower case) password was lost so I had to hit the clear button after trying everything to get access...2 Big Glitches in one little upgrade.
I notice that in any web-browser (WEx, FF, Chrome) the Home>Status>Device View is bugged showing
"style = "font-size:9px;color:#777;"
in empty slots C and D instead of reading "(Empty)" as version K.15.05.002 neatly shows.
Also on that page, using Windows Explorer the Transmit statistics are displayed at the bottom of the Details box instead of alongside of the Receive statistics (IN EITHER VERSION)
Note: these display correctly in Chrome
Note: these do NOT display correctly in Firefox, but they are closer to where they should be.
#firmwareupdate