There is high volume squealing all over the Net about the new QT7.
You must purchase a new Pro key or wait till your update for the Production Suite arrives.
People are NOT happy with what happens to their systems after doing two silly things:
Updating to QT7 in the middle of a project without doing a clone of their system
Updating to Tiger in the middle of a project without making a backup clone fo their system.
Update at your peril.
This is my standard sigfile so do not take it personally: "For crying out loud, read the freakin' manual."