It is old new by now, but there was a bit of hubbub recently about Apple's inclusion of Safari 3 in its update manager (for Windows).
Gruber has a good writeup, concluding that there would be no issue at all if Apple left the box unchecked by default or visually separated new installs. I pretty much agree. I don't really have a problem with Apple using the update tool as a way to advertise new applications, but don't make it a default install. However, it doesn't end there.
Apple KEEPS TRYING TO INSTALL IT! I have two browsers already (Firefox, IE), I hardly need a third.