The password will only show up in the log If the password was reset through EMAIL which doesn't affect changing it in your profile in this case.
Seller give new owner the password and he can change it on the profile.
The log is to prevent hacking not account sales.
It will show up even you change from the profile. Look at that log.
This was his earlier auction
https://bitcointalk.org/index.php?topic=711892.0For those worried about the password change revealing that it was sold:
There's a very simple solution. The buyer does not need to reveal ze day on which he changed ze password. Also. The buyer and I can be discreet about the sale so that no one will know if it actually was sold except me, the buyer, and the escrow.
Also FWIW I do change my password sometimes.
You don't get it. As soon as a 1000+ activity, 1000+ posts Legendary account created in early 2011 changes its password, everybody will be aware.
One solution can be that you wait for a day when several accounts matching your description changes password. Its not your problem, its the buyers.