Filtering the issue to show only 6.x issues shows also 7.x issues

I can confirm the issue, which is not present when you filter the issues to show only 6.x-dev issues.

This actually doesn't happen with other modules (e.g., Book access) that have issues for 6.x and 7.x branches.

I can confirm the link is still showing the wrong issues. I believe this is a project.module issue, so moving it there.

At first I thought this might have been corrupted data on d.o (since all this series stuff is based on release nodes and taxonomy values and such, not just string matching version strings). But upon a closer inspection, the problem is that the views handler providing this filter isn't paying attention to node revisions. Since the site_verify 7.x-1.x-dev release node was once tagged for 6.x (back before the Git migration), the query from the filter is getting confused. The bug is in project_issue/views/handlers/project_issue_handler_filter_issue_version.inc:

          $query = db_query("SELECT td.name, td.tid, tn.nid FROM {term_data} td INNER JOIN {term_node} tn ON td.tid = tn.tid WHERE tn.tid IN ($tid_placeholders) AND tn.nid IN ($nid_placeholders) ORDER BY td.weight", $query_args);

The last WHERE clause needs to be effectively AND tn.vid IN ($node_vid_placeholders) with the corresponding change to where we're now initializing $nid_placeholders to actually give us $node_vid_placeholders.

Anyone feel like turning this into a patch?

I am closing this issue, which is for a not supported Drupal version.