I've looked for this, but I just can't find it. Long ago I tried fixing it, but the fix I found didn't work, so since I just upgraded to the latest version, I thought I'd ask here.
When I create a post, it is timestamped with UTC time, not my time. Going into the site options and setting my time -5 hours from UTC doesn't fix it. When the page reloads, it's back to 0 hours.
I am using the default 1.6 theme, modified only a small amount to change some images and the order of the sidebar.