Glitches heavily after the update. Can't use the overclock menu at all (even scroll it) and can buy comps or upgrades only after a few reloads. Also stars on many achievements don't disappear until reload. Waiting for fixes!
I can't reproduce the problems you are having. What browser are you using? Did you clear your cache? The achievements now require you to press a button to unlock the reward, then the notification star will go away.