A few sites (such as electronic banking) do not work with OmniWeb, although they work with Safari. Perhaps OmniWeb is using an earlier version of Webcore? Also, when you write to the Google field a search term including umlauts (such as öä), OmniWeb converts these to some strange coding. With Safari there are no problems. Also, OmniWeb 5.0 has crashed twice since I started to use it a week ago.

The good points are: tabbed browsing with a preview in a drawer, autofill for usernames and passwords, and speed.

Update: JJ pointed out that "OmniWeb 5.0's rendering engine is based on WebCore v85, which corresponds to Safari 1.0 from June 2003. The current version of Safari (1.2.3) is based on WebCore v125.9." (More information.)