I was never using the cockpit ToolTips for the trim settings on the 752. I always left it at 4 on the Stab Trim Indicator UNTIL v4.6, then I would put it as close as possible to the setting shown in the Takeoff page of the CDU.

I see that the ToolTip is showing -2.8 over the Trim Indicator in the VC (in the image), but I have only ever seen the ToolTips there in the 2D Throttle panel. Now I'll have to go and check to see if I can get it to display in the VC like yours. :o ;D

[edit]Just finished checking and the cockpit ToolTip does show. ;D[/edit]