Working awesome on Opera 10 for me.
Thanks
Edit: Fellow Opera users. Do this:
1. Create a folder to put the scripts in. I recommend a 'scripts' folder inside where you store your other opera config files. If you don't know where that is, then....
(XP) C:\Documents and Settings\"your username"\Application Data\Opera\Opera\profile\
(Vista) C:\Users\"your username"\AppData\Roaming\Opera\Opera\profile\
(OSX) /Users/"your username"/Library/Preferences/Opera Preferences/
(Linux) ~/.opera/
2. Download the .user.js file from this thread and put it in the folder you just made.
3. Open Opera, go to Tools -> Preferences -> Advanced -> Content -> JavaScript Options
4. Under the field where it says "User JavaScript Files" paste the path to the folder you made and saved the script to. For me, I'm running Linux so that's /home/drack/.opera/scripts/
5. Restart Opera. Forums should be fixed for you!