PD4ML pd4ml = new PD4ML();
...
PD4PageMark mark = new PD4PageMark();
mark.setAreaHeight(-1);
mark.setHtmlTemplate("<table width='100%'><tr><td style='background-image:url(http://localhost:9080/Web1/images/base/print_logo.gif);background-repeat: repeat-x;'>&nbsp;</td></tr></table>");
pd4ml.setPageFooter(mark);

If i change setPageFooter to setPageHeader, the print_logo.gif was dispaly in the page(s) header correctly.

If i change html template to

<table width='100%'><tr><td>aaa</td></tr></table>

and setPageFooter, "aaa" was display in the page(s) footer correctly.

If i set background image to page footer with table, there's "Nothing" in the pdf page(s) footer but I can see debug info. display below :

image not yet in cache
http://localhost:9080/Web1/images/base/print_logo.gif
not yet in cache: http://localhost:9080/Web1/images/base/print_logo.gif
image size: 1523

WinXP SP3 / WAS 6.1 / PD4ML 360fx1

Does it change anything if you append the footer definition with some more content? For example:

...</td></tr></table><p>&nbsp;</p>

Np :(
I try "...</td></tr></table><p>123abc</p>"
print_logo.gif and "123abc" were not rendered in the pdf page(s) footer.

In older versions it could be caused by an influence of enableImgSplit(false) rendering mode. The newest versions should be free of the problem.