Hi Ian,
Hi
In IE the menu disappears as the cursor passes over the 'gap', Firefox seems to handle it OK.
The easiest way to sort it would be to make the level-1 and level-2 ul links 5px wider, so in CSSMenuWriter/cssmw_home/menu.css in the width properties for rules ul#cssmw_home ul.level-1 > li > a and ul#cssmw_home ul.level-2 > li > a (at lines approx 108 and 163), change the width in each from 145px to 150px.
I think that should sort it.