Recently I had the same issue. I changed the password of one of these switches and when I tried to log-in again I was not able to do it using the new password, and even worst I was not able to reset it to factory defaults either.
I researched a lot about this issue without any success until and one of the posts on this blog gave me and idea, so I started entering just some characters of the password I previously configured, so I first tried entering only the first character of the password and it did not work, then the first two, then the first three then the first four and didn’t work either, but when I entered only the first five characters of my 8-character length password… VOILÀ !! Finally I gained access to the web-interface configuration.
Me and my co-workers were very curious about this issue, so we started configuring different length passwords to see if there was a common pattern but we couldn’t find it, some passwords worked well and were fully recognized and others were only partially recognized: two, three or five characters. We thought that it was a web-browser issue but we tried three different browsers with no change... We managed to find a word (no special characters or numbers) that was fully recognized and we configured it as a password on the switch and it is working well, but we all agree this is one of the must strange bugs we've ever found.
