OK
It happened to me again
the threads did not merge, they vanished!!!
I searched threads on the same topic, founf 4 or 5
picked a post number on the first thread and then merged the other theads into the first...
Went back with the browser instead of making a new search
On the third try the whole thing was gone
The markers that indicate the threads were merged where there but only took me to a message "can not be found"
The posts cpuld no longer be found via a search... or in any pother way
This is ridiculous 
Lost a lot of posts I wanted to save and have together... merging is supposed to put theads you care about into one... it should not make the info you want in one place get deleted...
Why is this happenening and where do the posts go?
I may have merged a thread into an already merged thread or into itself by mistake... but that should not delete everything... should it?
Something is wrong with the merge feature sometimes...
