Creating a HTML Listing removes empty LInes on save!

Hi,

we run the latest DT 6.3 / 28.2.2014 on our new website. A huge problem is, that if you save the listing in HTML mode (option), empty lines are removed and the whole layout of the listing is destroyed.

Inserting a space before carriage return prevents removing the line, but this is no solution. customers will not understand this.

PWe need a patch very urgent. This way we cannot go online.

Thank you for your help.

Karl