Re: Bitcoin Address Collisions

Bitcointalk

2010-02-23 22:24:00 UTC - Original Post
Are generated bitcoins encrypted with whichever address is currently displayed in the main Bitcoin window?
No, each generated transaction uses a new, single-use address.

Nothing uses the address in the main window, it's just there for convenience for you to copy.  0.2.5 has a "New..." button next to it to make it easy to change each time you use it.