Recently, on certain sites, Safari has started acting strangely. Basically, after a page loads (like this page, just now, coincidentally), some of the content is missing/blank. If I click off Safari onto another app/desktop, the full content comes back, and I can then use the site as normal. There doesn't seem to be any pattern to it. 10.5.1, 3.0.4 Has anyone else had this problem?