Opera users beware newly discovered flaw
Opera Browser Users Urged to Upgrade
Security researchers have uncovered a security weakness in one of the more recent versions of the Opera Web browser that bad guys could use to trick users into downloading and running unwanted programs on their computers.
Computer security firm Secunia said its researchers found that a design error in the way Opera processes mouse clicks in new browser windows -- combined with the predictability of the position of the "File Download" dialog box -- could be exploited to trick the user into clicking on the "Open" button of a file download prompt, even if the user actually clicked on the button that says "Save" or "Cancel."
Secunia has only verified that the exploit works in Opera versions 8.01, though it said earlier versions may be vulnerable as well. To check which version you are running, open up an Opera browser window and click on "Help" from the top menu and then "About Opera." The version information should be the first thing displayed under the heading "Version Information."
If you are running Opera 8.01, it might be a good time to upgrade to the latest version -- 8.51.