Confirmed.
I think the whole thing should be a strict 3 column grid spread out across the whole page width.

I imagine the following structure

2012

Sponsor

Sponsor01       Sponsor05       Sponsor09
Sponsor02       Sponsor06       Sponsor10
Sponsor03       Sponsor07       Sponsor11
Sponsor04       Sponsor08       Sponsor12


Associate

Associate01     Associate05     Associate09
Associate02     Associate06     Associate10
Associate03     Associate07     Associate11
Associate04     Associate08     Associate12


etc.

Best would probably to use css columns

Created attachment 242970 [details] [review]
Fixed bug "FoG list of previous donors needs a consistent multicolumn support" with css columns

Comment on attachment 242970 [details] [review]
Fixed bug "FoG list of previous donors needs a consistent multicolumn support" with css columns

>diff -ruN theme_new/page-previous-donors.php theme/page-previous-donors.php
>--- theme_new/page-previous-donors.php	2013-04-30 23:48:33.961267100 +0200
>+++ theme/page-previous-donors.php	2013-04-22 16:26:24.000000000 +0200
>@@ -60,7 +60,7 @@
>                         $level_count = count($donor_array);
>                         if ($level_count > 1) { // The count behaves weirdly for me. Always +1.
>                             echo "<h4>$fname_dispname_map[$level]</h4>\n";
>-                            echo '<ul class="col-3">'."\n";
>+                            echo '<ul style="list-style-type: disc;">'."\n";
>                             foreach ($donor_array as $donor_line) {
>                                 $donor = trim($donor_line, "\x00..\x20");
>                                 if (strlen($donor) > 0)
>diff -ruN theme_new/style.css theme/style.css
>--- theme_new/style.css	2013-04-30 23:47:56.109102100 +0200
>+++ theme/style.css	2013-04-22 16:26:24.000000000 +0200
>@@ -1088,9 +1088,3 @@
> .crm-section {
> 	margin-bottom: 10px;
> }
>-
>-.col-3{
>-    columns:100px 3;
>-    -webkit-columns:100px 3; /* Safari and Chrome */
>-    -moz-columns:100px 3; /* Firefox */
>-}

Created attachment 259766 [details]
Screenshot of previous donors page

Review of attachment 242970 [details] [review]:

Seems to have bitrotted since April, unfortunately. Sorry for the slow review. Totally forgot about this one.

Created attachment 259793 [details] [review]
FoG list of previous donors with a consistent multicolumn support

Created attachment 259794 [details] [review]
FoG list of previous donors with a consistent multicolumn  support.

Review of attachment 259794 [details] [review]:

Looks good.
Committed as https://git.gnome.org/browse/gnome-web-www/commit/?id=bc2e5065610697f007f156e849a646773cb7db3a

Thank you very much for your fix!