Quite simply the easiest upgrade of any application I’ve ever done.
Note, since this is is a virtual server, much snapshotting and reverting occurred during testing. and retesting.
Step 1: deleted everything in my wordpress directory except wp-config.php and my wpimages folder
Step 2: tar’d -xzvf the v1.5 wordpress file
Step 3: pointed firefox to /wp-admin/upgrade.php location
Step 4: clicked upgrade ….
Step 5: added the moblog setting for the image wrapping into the style.css file