I ran into a couple of issues with this version of OW. This was in 10.8.5 on a QC 2.8 Xeon Mac Pro with 8GB of RAM.
First, it would not load secure pages, for example
https://www.macupdate.com/
It just seemingly did nothing.
Second, the preferences window would not show the Global Site Preferences, if I clicked the Appearance icon the part of the window beneath the menu bar would go blank until I clicked the Previous button on the menu bar to go back to one of the preferences above the bottom row. This was also true for the Ad Blocking, Languages, and Security panes.
Other than that it seemed to function pretty well, though I'm guessing that we will lose 1Password support (which of course is out of Omni's hands). Thank you for letting us test drive this release. :-)