Is this option not working for anyone else? Login and I check the box for "remember me on each visit" the next time I come back, I am logged out.

Works fine for me.

Did you try clearing your cookies, and then logging back in?

Mine seems to be resetting about once a day.

This should improve going forward.
The timeout for the cookies was set unnecessarily low. I've upped the value to being one year, so this shouldn't be a problem any longer.

If the problem persists, Log Out (click here) and then log back in. Logging out should expire any current cookies that you have for the site and allow a fresh one to be written.