Inspired by this thread on the RedBubble forums I've created the following Greasemonkey script to implement the idea. So, if you're a Firefox user, and you've installed Greasemonkey, and you're a RedBubble user, then install this:
redbubble-links-in-new-window.user.js
After you've installed it you should find that every link you click on is opened in a new window or tab (depending on how you've got your copy of FireFox configured and what other window/tab oriented extensions you've got installed).
Personally I can't stand the idea but, if it helps someone who does like the idea... ;-)
This RedBubble hack is brought to you by Dave Pearson.
Please note: This isn't associated with RedBubble. RedBubble don't endorse this, there's no connection. It's just a hack to make life a little easier.