2009. I couldn't believe how lucky I was to even think of it. I had never run into the issue using that password, which I used everywhere (wouldn't do that these days) except when I tried playing with MySQL on my local machine a few months prior. I think the issue was I couldn't log into the db as admin on the command line, even though it didn't have any trouble setting the password. I don't remember how I figured out that was the problem with MySQL though. I think it had set my password to [start of password]+[last command] and I was able to see that somewhere and deduce how something like that could possibly happen.
When I tried to transfer the domain, support was baffled about why their standard transfer processes was was failing just for my account. I think it went on for a few weeks but I wasn't in any hurry so I didn't bother them much. They kept asking me to try again a bunch, but nothing they changed ever worked. At some point the idea just hit me that the password was the same from that MySQL issue. By that time I had moved on to using a new password everywhere because of that issue, but had never switch it for this account. So I switched the password, tried the transfer again, and it finally worked! I told support what I changed and why I think it might have been causing an issue but they never did directly confirm that was the problem. I'm still pretty sure it was. After I changed the password, they sent me an email with the new password in it, naked as the day it was born.
When I tried to transfer the domain, support was baffled about why their standard transfer processes was was failing just for my account. I think it went on for a few weeks but I wasn't in any hurry so I didn't bother them much. They kept asking me to try again a bunch, but nothing they changed ever worked. At some point the idea just hit me that the password was the same from that MySQL issue. By that time I had moved on to using a new password everywhere because of that issue, but had never switch it for this account. So I switched the password, tried the transfer again, and it finally worked! I told support what I changed and why I think it might have been causing an issue but they never did directly confirm that was the problem. I'm still pretty sure it was. After I changed the password, they sent me an email with the new password in it, naked as the day it was born.