Is she taller than me?
On the test, he got a higher score than me.
Egad. One should say:
Is she taller than I [am]?
On the test, he got a higher score than I [did].
True: My son likes feta cheese more than I.
Pathetic: My son likes feta cheese more than me.
Now, having gotten that off my chest, me feel much better.
(For more in this curmudgeonly vein, check out this Onion classic: Our Street Gangs Are Probably Using Bad Language.)