[zottel]

Probably a bit late, but as to what it does: OW will now NEVER open a new window, only new tabs, when you click on links. You might want to forbid Javascripts to resize or rearrange windows in the security preferences, as this will affect the whole window with all the other tabs in it when a little dialog is opened by a website that is designed to be small.

Which brings me to another suggestion: Opera has (or at least had?) an MDI solution for this: Tabs could be smaller than the Opera window so resizing only affects the tab window, not the whole browser window. A nice feature if you don't like more than one browser window, like me. :-)