[AJ007]

Not answering your question, but the most inane thing I've seen is sites that have a password character limit but then don't tell you, and only save the first X number of characters.

There probably is a special level of hell for UI UX sins.

[lowe]

This drives me insane. It especially bites everyone using a a manager to generate long random passwords.

Password fields that are too short cause a similar problem, where you ask "am i still typing? did it cut me off?"

We purposely made the fields huge to help with this on: https://www.dropbox.com/register