A new version of the blogs directory is now available. Hopefully this new version will resolve any issues reported. If you still have an issue with this new version please post a detailed description of the problem along with a link to your site so we can see the problem for ourselves.
I believe there were some questions about which fields the search feature, well, searches. The answer is that is searches the domain (vhost installs) and path (non-vhost installs) in the wp_blogs table.
The reason it doesn't search through blog titles and descriptions is that those items are stored in the options table for each blog. It wouldn't be feasible to search through each and every options table.