Thanks! Your method really helps.
I hope some day developers will pay attention to this problem...

New version released and now there is a white window instead of black one. But pages are still empty.
Is this problem being solved?

Here is a screenshot:
http://5.firepic.org/5/images/2014-04/08/ghite8z0kbrs.jpg

Looks like it doesn`t depend on OS version. (I tried on Windows 7 x64, Windows 8 x64, Windows XP SP3)
Would be great to have this bug fixed.

When i start Opera (15-20) with "Run as different user" command - Opera starts, but all pages are empty. "Refresh" doesn`t help.
Is there any way to make it work? (Opera 12 had no problems with "Run as")