missing topics
 

why do I get s many notices saying the topic is not available. an awful lot of them lately...

If it's put in the wrong section the Mods move them. Sometimes there is a problem and they have to change the name a bit. They do show up eventually

An Invalid Thread is one that has either been:
-moved and the redirect has expired;
-merged and the redirect has expired; or
-deleted because it did not comply with policy