I upgraded from forum 2.7.4 to forum 2.8.0 on geeklog.fr. Everything went well. However I find that:
1. Part of the text is outsite the tooltip (on index.php?forum=X pages).
2. The link color for New topic or Post Reply might be blank because depending to site links color, they can be unreadable on the blue background.
To solve this in public_html/forum/forum/layout/forum.css I changed
PHP Formatted Code
color: #fff !important;
3. On 3 columns sites with fixe width the breadcrumb, new topic link and post reply link are too tight. We might introduce her a new config option for blocks display (left, right, both)
I'm available to customise your themes or plugins for your Geeklog CMS