I've created a userstyle which will create a minimal version of the new usersymbols
Make sure you have Stylish for Firefox
installed as a browser extension (apparently it works in Opera too!
Then, install Minimal symbols from here
by clicking the "Install with Stylish" button!
Hoorah! You now either have a tidy minimal layout. If you are here to install the "Classic" version which used to exist here - you are out of luck, sorry. While probably a bit late, I've deleted it as I don't feel there's any point trying to avoid change. Embrace it instead and improve it if you can! As much as I understand that some people really don't like the new symbols, there's not point trying to hold ourselves back in the past. In the future, deviantART will inevitably look nothing like it does today - and I'm sure you'll agree that it'd be ridiculous to use hundreds of scripts just to keep it at what it is now. The old symbols will never be forgotten, but I promise you that the new ones are not so bad once you get used to them.