There are three mode of export to HTML:

Div - in this mode all objects of a report are converted to the div block element; the report is converted precisely, except for vertical text alignment;

Span is the same as the Div mode but the span element is used;

Table - in this mode all objects of a report are converted to the table block element; in this mode the vertical text alignment is correct but, if the WordWrap is disabled then the problem may occur with long lines of text.