Having the same problem as
spoon13_13 from... February '09. The thread was closed, but here's what he posted:
"Hi
I downloaded rocket dock and quickly decided I hated all the default icons so I deleted them all and set the opacity to transparent...great idea...
Now if I go to the task manager it tells me rocket dock is running but I can't see it, nor can I add icons to it. I've tried randomly dropping icons where I think it's hiding but without any success. I've also tried uninstalling it with revo (so deleting registry items and leftover program files) then reinstalling it but its still hiding!
So yeah, any ideas how I can get it back?! Thanks in advance

"