Oops - yes, - am yet to post something without a typo.
In the menu.php again, you can specify that for individual elements by addiing an inline style to the ul class="level-1" element, using ' style="left:0px;" '
<ul class="level-1" style="left:0px;">
You can try different amounts, - minus numbers are also allowed: style="left:-10px;"
This property is set (or can be set) universally in the menu.css stylesheet:
ul#cssmw0 ul.level-1 {
left: 0px;
padding: 1px 0 0 0;
top: 100%;
}
So that you can set the property for the whole level-1 (level-2 etc) sub menu for all, and then specify inline styles for individual elements. So i suppose the right order would be to check that the ul.level-1bit in the menu.css stylesheet is set to 'left:0px' first, and then adjust the individual elements' inline styles second.
I thought that these could be set in the CSSMenuWriter GUI during the creating menu process - maybe they can - but I couldn't find it!