Hide/Show bug ?

[Kawert]

Hi,

I have an iMac with Mavericks with the hide/show option. When I start my iMac and for the first time I go down to view my dock, it doesn't work. I have to move out and go down a second time to show the dock. I have the same problem if I close my session and open it again.

I don't have an external monitor and I have already made a clean install.

Any ideas ?

Thanks.