Anybody else having issues with the Dock?

I have finally installed the GM copy and i'm still having the same issue with my dock. I work with a triple monitor setup and when switching using my secondary and third monitor, the dock does not always show up. I have to keep moving my cursor to the bottom of the screen for a while before it finally shows up.

Is there a .plist file I need to delete or something? or maybe I should just do a fresh install... (really rather not)