Resolved Mt. Lion dock is transparent on startup

[technowar]

I have a weird problem on my dock. It is transparent the time I boot my Mt. Lion. I have to 'killall Dock' in my terminal to have the original dock of Mt. Lion. By the way, I had this code:

defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="spacer-tile";}'

To have separators but then I removed it. Now, every time I boot my Mac, the dock is transparent.

Resolved. Just reset PRAM.