FWIW, if you disable locking the screen entirely for the accounts, then it will not lock the screen when switching users anymore.
Open 'gconf-editor' (e.g. with Alt-F2) and go to /desktop/gnome/lockdown and check disable_lock_screen .
This will entirely remove the ability to lock the screen though. You can install xlock (xlockmore) to still be able to do that.
OT: IMHO ubuntu (linux in general?) is evolving so fast, that regressions like this pop up to often (even skipped Karmic because of this). Luckily, there is always a fix :-).
FWIW, if you disable locking the screen entirely for the accounts, then it will not lock the screen when switching users anymore.
Open 'gconf-editor' (e.g. with Alt-F2) and go to /desktop/ gnome/lockdown and check disable_lock_screen .
This will entirely remove the ability to lock the screen though. You can install xlock (xlockmore) to still be able to do that.
OT: IMHO ubuntu (linux in general?) is evolving so fast, that regressions like this pop up to often (even skipped Karmic because of this). Luckily, there is always a fix :-).