Update: Looks like it’s working now. Fully close and restart Chrome and play with Groovebud to your heart’s content.
I just want to say that this Chrome extenstion is awesome. It takes any phone that can read/scan QR codes (or has a decent mobile browser) and turns it into a mobile remote control for your Grooveshark queue.
Step 1) Simply download the extension from the Chrome App store.
Step 2) The next time you open Grooveshark, click on the Groovebud icon in your address bar — a QR code and accompanying link will appear.

Step 3) Either scan the QR code with your phone, or type the link into your phone’s browser and voila! You now have remote control of Grooveshark from anywhere in your house.

Skip forward or back to songs, and control playing and pausing.

Having a party and don’t want people changing your music? Lock away your computer and control the music from the palm of your hand! Want to listen to Grooveshark by the pool? Queue up a playlist and you’re in total control.
Thanks so much to @bengl for developing this extension!
Note from the developer: This software is alpha. It’s still in development, and as such, things are bound to break. Sorry about that, but I’ll do my best to fix things.