I just added a new panel on the left as you can see on this picture:

This panel is a dock (so it should be centered) and I only show the favorite software.
The problem as you can see is that it is not centered, in fact when I open an application that is not in the favorites and then close it, the dock goes up. Should I post something on dev.getsol.us?

Do your panel settings look something like this? Works for me as expected.

    Xarius I think it comes from the option that only shows faorites, actually there are empty slots that are added to the dock

        Bertaga97 Even when I change mine to "Only show favorites" it's still working correctly for me. Not sure what's going on here. Someone else may have a better idea.