The following may likely have had happened to you before: you're reading a 3.3.5 guide about a class and when you finally get to the talent builds, you find that they're Wowhead links. Because Wowhead is updated for Cataclysm, the links don't work like they should, and you pull your hair out because you wanna see the fricking build!
I almost feel guilty writing a guide about this because the solution is so damn simple.
Step 1:
Right-click the link and click "Copy Link Location"
Step 2:
Paste the link in your address bar - do not press Enter yet, the link will truncate if you do
Step 3:
Change "wowhead" to "openwow" in the URL, and press Enter.