It seems that recently visited is picking up the wrong token from the database. This happens on this bug tracker. Following is a sample recently visited output, this is shown once I login:

Recently Visited: a:40:{s:8:"_version";s:2:"v8";s:10:"_view_type";s:6:"simple";s:13:"show_category";
a:1:{i:0;s:1:"0";}s:13:"show_severity";a:1:{i:0;i:0;}s:11:"show_status";
a:1:{i:0;i:80;}s:8:"per_page";i:50;s:17:"highlight_changed";i:6;s:11:"reporter_id";
a:1:{i:0;i:0;}s:10:"handler_id";a:1:{i:0;i:0;}s:10:"project_id";a:1:{i:0;i:-3;}s:4:"sort";
s:12:"last_updated";s:3:"dir";s:4:"DESC";s:11:"start_month";i:9;s:9:"start_day";
i:1;s:10:"start_year";i:2007;s:9:"end_month";i:9;s:7:"end_day";i:29;s:8:"end_year";
i:2007;s:6:"search";s:0:"";s:11:"hide_status";a:1:{i:0;i:80;}s:16:"and_not_assigned";
b:0;s:15:"show_resolution";a:1:{i:0;i:0;}s:10:"show_build";a:1:{i:0;s:1:"0";}s:12:"show_version";
a:1:{i:0;s:1:"0";}s:17:"do_filter_by_date";b:0;s:16:"fixed_in_version";a:1:{i:0;s:1:"0";}s:14:"target_version";
a:1:{i:0;s:1:"0";}s:13:"show_priority";a:1:{i:0;i:0;}s:12:"user_monitor";
a:1:{i:0;i:0;}s:10:"view_state";i:0;s:13:"custom_fields";a:1:{i:1;
a:1:{i:0;s:1:"0";}}s:13:"sticky_issues";s:3:"off";s:17:"relationship_type";
i:-1;s:16:"relationship_bug";i:0;s:12:"show_profile";a:1:{i:0;i:0;}s:8:"platform";
a:1:{i:0;i:0;}s:2:"os";a:1:{i:0;i:0;}s:8:"os_build";a:1:{i:0;i:0;}s:10:"tag_string";
s:0:"";s:10:"tag_select";i:0;}