my first beer i ever brewed had the over carbed problem as well... later on i found out that the hops i used were known to help retain the head on a beer... and that i had left them in the boil too long Doh! it was really hoppy goodness but it took like 10 min for each one to settle down after the pour into a glass. otherwise it was like a giant foam puff if you weren't careful.
i also brew at around 4500 feet... and i use 3/4 cup dextrose to prime per 5 gal.
“It has been long recognized that the problems with alcohol relate not to the use of a bad thing,
but to the abuse of a good thing." -Abe Lincoln
“Here’s to a long life and a merry one,
a quick death and an easy one, a pretty girl and a true one,
a cold beer and another one." -Lewis Henry
"old schlitz...new schlitz... both getz you LITZ!"