I was installing it using the 198MB update from apple in a standalone installer I downloaded using Software update (I just chose Download Now from the Software Update File Menu). And during the installation, it froze. But the HD was still working, I was assuming its still installing. After A while when the installing finished, I did a hard reset. The computer did the two startup sounds, as usual with .x updates. About this Mac says I have 10.5.3. But all my applications say (from Get Info) they were last modified in Feb 12. the 10.5.2 update, and my installer won't let me install the update because it doesn't meet the requirements, I am now downloading a 536MB "combo" update, this is supposedly (as others have told me), will reapply 10.5.3 no questions asked, is this true?