Of course, they don't tell you this anywhere. This is what you get when you enable the feature: http://www.opera.com/portal/turbo/
I haven't been able to find anything more forthcoming on their site, not even in fine print. In fact, their marketing material quite blatantly skirts the issue.
The privacy policy linked from their main site (http://www.opera.com/privacy/) has a section called "Privacy in the Opera Web browser" which goes into specific features, including some that are new to Opera 10, but nothing at all about "turbo". It does say this though:
"The Opera user’s Web usage is not tracked".
Except when it is.
I don't know what standards you hold Opera to, but any half respectable company would be rubbing your face in disclaimers before enabling a feature like this and I've seen a few crucified for not doing so.
I wonder where you got the knowledge from then...
Perhaps you learned it from the help that comes with Opera:
> "The technology behind Opera Turbo is a proxy server with server-side compression of Web pages. A compression rate of up to 80% can be achieved, in part by reducing the quality of images. If you want to view an image uncompressed, right-click on the image, and select "Reload Image in Full Quality"."
When Google added PageRank to their toolbar, they forced you to read at least two warnings before you could use it that said, in big letters, something like "PLEASE READ THIS WARNING.. IT'S NOT THE USUAL YADA YADA".
At the very least, that's what I would expect from anybody, but especially from a browser, a piece of software that users put an enormous amount of trust in. I've managed to find a few mentions in Opera's marketing material that this feature goes through their servers, but no hint that there is any privacy issue.
It USED to be that if you clicked a right-click menu outside of the control it was opened in, it wouldn't execute the action of that click.
(For example, if I right click in this textbox and "copy" is outside this textbox, it wouldn't copy.)
Now? Fixed! Proof?
Now? Fixed!
I'm looking forward to when Google releases Chrome so that the 1Password dev's will write an extension for it.
http://arstechnica.com/software/reviews/2009/09/first-look-o...
(scroll down to benchmarks)
Also, it uses 40% more memory than before and I can't be bothered putting back v9.64. Darn!