Opera and Link Targets
If you’re like me and you aren’t particularly fond of sites opening in new tabs without your explicit command, you might be interested in activating Opera’s Ignore Target setting. This setting “Unfortunately … also disables the window.open() method, breaking the functionality of many sites,” so you might prefer to utilize JKing’s UserJS which stops most links from opening in new windows.
On the other hand, you might prefer all links to external sites to open in a new tab. I recently wrote a script that does just that for someone on the MyOpera forum.