LOL. Never. But you say it like if that one was the VisualSourceSafe of bugtracking tools.
Having used both HP QC and Microsoft Team Foundation Server (the successor to VSS) for issue tracking, I have to say that Jira is better than TFS is better than QC. The big problem I ran into is that many teams had different fields and TFS and QC showed them all. This is a huge problem when there are well over 100 teams.