From Unsanity:
http://www.unsanity.org/archives/mac_os_x/shock_and_awe.php
"... When you see the "Optimizing System Performance" phase of a software update, Mac OS X is really updating prebinding. Updating prebinding has a very, very nasty bug in it (look at _dyld_update_prebinding)..."
http://www.unsanity.org/archives/mac_os_x/shock_and_awe.php
"... When you see the "Optimizing System Performance" phase of a software update, Mac OS X is really updating prebinding. Updating prebinding has a very, very nasty bug in it (look at _dyld_update_prebinding)..."