Safari has a Top Sites feature that goes to a website and gets a page for the most popular sites that a user visits. Similar to Chrome but the difference is that Safari automatically refreshes the page. This results to a high number of 1 page Visits from Safari and that's a problem because:
1. It distorts Visitors/Visits/PVs numbers
2. It inflates Bounce Rates
Those Visits are not user-initiated so they should be treated like bots. In other words they should be excluded from any Omniture reports
Cheers
Georgios