In fact may not be a bug.

To use plainhtml output in pres2 w/ php 4.1.2 i've done those changes (see below) to have tables w/multiple columns.

(I know, 4.1.2 is far from the highest php. But the pres2 is from the php4CVS of yesterday  evening. You do as you wish)

in objects.php:

1818c1818
<                       $i = 1;
---
>                       $i = 0;
1820c1820
<                               if(!($i % $this->columns)) {
---
>                               if(($i % $this->columns)==0) {
1826c1826
<                               if(($i % $this->columns)==0) {
---
>                               if(($i % $this->columns)!=0) {