Not every bug is tagged with a keyword. The lines in the Bug Jar summary don't sum up, they're just glimpses into various interesting bits within Bugzilla. From the Documentation Bug Jar at which you were looking? That would be bug #4609, "Installation instructions: How to patch mmap_min_addr value for Ubuntu 8.10". For an end user though, the more interesting Bug Jars for tracking the progress of Maemo are Official Platform and Official Applications, not Documentation. Combine open critical/blocker bugs in Official Platform and Official Applications, and you'll currently find thirty-one bugs.