Y Axis Value on Horizontal Menus Behave Differently in IE vs Other Browsers

In the SetCorrection() field under the horizontal menu common customizations the Y axis value behaves differently under Windows IE 6 & 7 compared to Win & Mac Firefox 2 & Safari. If the Y value is 0, the menu drops down on IE but drops up in Firefox & Safari. If it is a positive value the sub menu move down on the screen in IE but up in Firefox and Safari. If it is a negative value, it move up on the screen in IE and down on the screen in Firefox and Safari.

Setting in Lucid Menu common customizations:
SetCorrection(0, 50)
_pop.SetCorrection(0, 50)
SetExpandIcon(true,'','')