I have copied spreadsheet data into Kompozer (html editor) in 4.0 works differently why ?

I use Kompozer (HTML editor) to update web sites. Over the last few years I have been able to take a spreadsheet in Calc and copy portions of it into a html page as a table. This has produced tidy tables.

I have just upgraded from LO 3.5/6 to LO 4.0 and the result has changed. Empty cells are compressed and column integrity is lost. The version of Kompozer has not changed in 4 years !.

Does anyone know how to cure this