If I tell Google Chrome to remember passwords they seem to be remembered for the current session OK, but some of them are missing when I shut down and restart Chrome.
I haven't found the exact pattern but it seems to be that if you have used (or perhaps saved) the username and password in the previous session, it is remembered in the next. But previously saved passwords not used in that previous session are lost (though the URLs and usernames are generally remembered).
I have reproduced this with 3.0.195.27, Rev 2 development version and the released Rev 2 on both Windows XP and Windows 7 RC.