The latest development snapshot of Opera 10 contains a new skin for the browser, which appears to have its base from the Google Chrome skin.
Along with the new release, the Opera team have noticed that reaching version 10 has become a problem, with some high profile sites detecting the user string as version 1. To solve this Opera have temporarily changed the user agent string to read “Opera/9.80 (X11; Linux i686; U; en) Presto/2.2.15 Version/10.00”.
A full list of changes and download links can be found in Opera Desktop Team blog.