404. That’s an error.
The requested URL /bookmarks/mark?op=edit&output=popup&bkmk=https%3A%2F%2Fpr.ai%2Fshowthread.php%3Ft%3D14347&title=AxiDraw%2C+drawing+machine%2C+Evil+Mad+Scientist+Laboratories%2C+Sunnyvale%2C+California%2C+USA
was not found on this server. That’s all we know.