I'm running the latest Natty beta and I've realized that cookies are not saving under Firefox.
Passwords and history save normally, but cookies do not. I have check the settings in Firefox and it is set to save history.
This becomes a problem because I am using two-step authentication for Google so every time I close a window I need to check my phone for a new code.
Also strange is that every time if I ever mistype my password entering Google (on the first bad type) they give me a captcha box to fill in.
These irregularities do not happen under Win XP sp3.