This is because the theme itself does not apply borders at all. If you want a border around the content of the modules than you'll need to code this in a style element within DreamPortal.template.php. Do a search in that file for this:
margin-bottom: 5px;
Than just add in a border.
margin-bottom: 5px; border: 1px solid black;
That should give you a border for each module. If you want the border to appear as if it is coming from within the header, than just change the margin-top property to like -3px so that it jumps up into the header a bit. If the border-top looks funny, just apply border-top: none; so you can do this also:
margin-bottom: 5px; border: 1px solid black; margin-top: -3px; border-top: none
The important thing to remember, if you offer other themes to your users besides this one, than it might not look good in other themes, so you should probably check for this theme only and if this theme is the one selected by either that user or a guest, than add in the border, margin-top, and border-top properties, otherwise, don't.
In any case, this is, moreso, Theme-related, since DP was coded so that modules can fit into any theme and look as though it automatically belongs in that theme. Alternatively, you can change the theme index.css file for this as well to include a border-left, and border-right for the roundframe css class rule, and than you can also add in a border, or border image for the lowerframe css class rule, as the SMF default theme, Curve, does this. But in doing this, it will affect your entire forum, not just the modules on the DP Homepage, but also your categories and boards display for that theme only.
It's really up to you.
- Solomon
P.S. - DP 1.1 will not add borders to your modules either, unless they are specified within the roundframe and lowerframe (background-image) classes. Because again, Dream Portal is meant to blend in with your theme and how your theme looks. HOWEVER, a Module Template could be coded in Dream Portal 1.1 to do anything with your modules, including adding borders around them, only in DP 1.1.