My one is working fine never had any problem try and uninstall and reinstall see if that works. - Govindji Patel

Have you checked "View>Toolbars>Thirty Day Challenge Toolbar" is ticked? - Matt #30dc

Yep. Done that. But thanks! Think I'm going with re-install - Wendy J. Roan

Did it work after you reinstalled? - Govindji Patel

Had that problem for a short while yesterday after I updated Flock, restart fixed it though. - Grace Midyette

My Stumble Toolbar keeps disappearing but TDC is fine. - Karen Kramer

mine dissapeared once, but came right back and has been fine since. - Michelle Trent

Thanks everyone for your comments. I had the same experience as Viragora - was gone and then when I restarted flock it came back. :) - Wendy J. Roan