I haven't seen that message on any of the DP or GM's and I don't have xcode.
My guess is that its an extension you have.
Use a different browser, problem solved.Glad I'm not alone.
...
Seriously considering rolling back to Mountain Lion...
Use a different browser, problem solved.
The only extension I had installed was the 1Password extension.
Use a different browser, problem solved.
Because the same browser doesn't exhibit the behavior for him on Mountain Lion.Why not?