Opera has a great design - one of the best i think.
But there is one thing... this ugly windows "File | Edit"-Dialog...
Heres the instruction how to remove it:
৺ Open Opera Preferences
then switch to the
৺ Advanced Tab
in the left menu, select
৺ Shortcuts
and click on
৺ Edit (Keyboard setup section)
In the next popup, expand the
৺ Application section
and scroll down till you can see the entry
৺ Platform Unix, F11 alt
Simple double click it, to make it editable. Remove the
৺ Platform Unix,
so that theres only left
৺ F11 alt
Save this changes. Now you can toggle your menu Bar by pressing Alt + F11
Update: Opera 10.0 beta 2 has now the option accessible by default. You just need to click on the "file" Dialog and untick "Show Menu Bar