But if I also add in "Date\Time tab" a date in the field "Date Created(YYYYMMDD)"=20080801 then I can not see anymore the keywords in the preview window, I only can see a "+ keywords" with an empty field.
(and impossible to extend the tree structure with the "+")
And I can not anymore "clear" this field: "Date Created(YYYYMMDD)"
See .jpg samples bellow:
1: jpg1 = only IPTC keywords =xnview, jpeg -->OK

2: jpg2 = IPTC keywords + IPTC "Date Created(YYYYMMDD)" --> Problem

FYI:I have also this "+" problem with some others IPTC Tags: topic in French