There is no more Print Preview menu

[GianAo]

First, sorry for my English.
Second, Opera 11.00 on Mac OsX 10.6.6

I keep having print problems; pressing Shift+P a popup window appears
with a "working" page elaboration. After a while (for some pages few
minutes) the preview appears but then with Cmd+P nothing happens. An
example?
http://en.wikipedia.org/wiki/Main_Page

I searched Print Preview menu item but ... there isn't any preview menu.
Then i tried with Cmd+P without preview and it works (often) in the right way.

So, what's that? Is Print Preview the bad guy? Is anybody else
experiencing the same situation?

Cheers. G