In all dominant browsers, using the <a target=”_blank”> tag to force a link to open in a new window breaks the Back button. The new window does not retain the browser history of the previous window, so the “Back” button is disabled. This is incredibly confusing, even for me, and I’ve been using the web for 10 years
My personal reason for not using _blank tages on my weblog is that I think it should be up to you – as the reader – when you want a new browser window to open.
Here is a little tip for you if you want to open new windows (I do this all the time myself when I want to look at something and go back to where I was by closing the window I opened):
Hold down the shift key while you click on the link (for Internet Exlorer and Opera – for Mozilla, hold down the control key while clicking the link) , that will make your browser open the link you click in a new window.