I have a view I converted to a tabbed workspace. at the top of the view was this object:

Code:
 
    
    Object oTL_Caption is a TextBox
        Set Auto_Size_State to False
        Set Size to 13 90
        Set Location to -2 26
        Set Label to 'Logged Out'
        Set FontPointHeight to 14
    End_Object
when you push the textbox up off the top of the screen, (location = -2 26) it totally fouls up the whole anchoring logic, and it's bloody hard to track down as to WHY the anchoring & scrolling is fubar. I had a dbTabpage with a grid on it in the center of the screen, and as you re-sized the page the whole tab page just upped and disappeared.

There are warnings in the help about piMinSize being larger than piSize, but no warnings I saw about placing objects partially outside the area of the scrolling container.