Another thing I notice with beta 2 is that when using ctrl+g to make google searches from the Address bar, it sometimes searches for whatever is on the clipboard instead of my typed in search terms.
Finally; sometimes only half of a search query appears when google opens after using ctrl+g.
e.g, I type in four words - only two appear in google and are searched for.
The search behavior in KM hasn't changed from v1.1 - 1.6b2. Selected text on the page is searched for first. So if you've selected text on a page and then use CTRL G, the selected text is searched for even if you typed into the URL Bar. Keep in mind that you never need to copy selected text to the clipboard in KM to search for it. Once text is selected, click the search button and it's automatically searched for. It's easier than dragging the selected text to the search bar or URL bar method found in other browsers. However, I do think URL Bar contents should be searched for before selected text. Could be a change implemented in the next release maybe.