bad links

Hello John
The discuss-link on the main-page does not work.

Discuss
Get Data From DOS Exe http://www.vbforums.com/showthread.php?threadid=81414
Less Memory Usage! http://www.vbforums.com/showthread.php?threadid=81622
SendMessage http://www.vbforums.com/showthread.php?threadid=81026
Need Help With Test Quesiton...... http://www.vbforums.com/showthread.php?threadid=80108
InputBoxes Nº Of Characters... http://www.vbforums.com/showthread.php?threadid=81602

I clicked on each of them and only got this mess:
vBulletin Message
No thread specified. If you followed a valid link, please notify the webmaster