Managed to figure it out, it was caused by the form not being able to
find a common split point between the two side by side text boxes.There
is an excellent blog post about this problem at
http://blogs.adobe.com/formfeed/2009/06/displaying_parallel_columns_of.htmlI
had tried his suggestions earlier but it turned out that even though
both text boxes used the same font/size etc, having them vertically
center align was causing the problem and making them vertically top
align solved it.Thanks also ...