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Full user review
Same good menus and appearance as previous version. Better W3C compliance than old version.
Still buggy, and I'm not only talking beta teething problems:
Memory use is better than it used to be, but Opera is still much better.
Printing is still terrible. Margins are never anything close to what is set, graphics are often (but not always) omitted, tables get truncated.
As always, add-ons get broken with every major version change.
Not reliable. Crashes occasionally, and can't seem to display some sites correctly.
This beta is hardly worth your time yet. Wait for the public release, or at least a later beta or release candidate. Maybe some of the new bugs (as well as the annoyingly long-time ones) will get resolved.