The popup menu code for vb3 is this. Your popup is off.
Content visible to verified customers only.
We map vb
styles to our style names so tddetails is alt1 and menubar is tcat.
Therefore you would need to see where in your alt1 style your setting a white background with a light yellow color. We do not use any type of popup style stuff. We use style mapping in vb3 which matches specific styles to specific photopost style classes.
So your issue is your looking at the wrong style class in vb
Maybe in your alt1 style in vb
try putting this setting the link colors to black #000000