Good guess but only Michel would know for sure.
If that the case than

> mm/dd/yyyy 
-- should be coded as
>= DATEADD(day,1, mm/dd/yyyy)

and

<= mm/dd/yyyy 
-- should be coded as
< DATEADD(day,1, mm/dd/yyyy)

>Perhaps the time portion added to the search date is 00:00:00
>That would explain it - unless you post exactly at midnight
>
>

>> and >=  is always >=
>< and <=   is always <
>

>
>