Mouse pointer offset when shown as arrow. Position ok if line-pointer (text-mode)

[Ulrich]

A display in Vbox shows Text and buttons in the top and a table with several lines and columns below. As soon as the mousepointer crosses the border from the screen-top to the table it offsets by 1.5 lines of the table vertically and about the same amount horizontal. If the mouse pointer goes across a field of the table which has text-contents, i.e. the mouse pointer changes to a line pointer to select text it adjusts perfectly to the text. This problem has shown up after installing Vbox 4.1 with extension pack 4.1 and guest additions 4.1. Everything was working fine with 4.0.12

[shiftyphil]

Can workaround by turning on "Display pointer trails" in the guest control panel.