Maybe this has come up before!
I was looking at posts from a forum member who joined in 2005 and noticed I was able to access his/her posts back to that date.
I don't think the loss of any of my posts could be thought of as scientifically significant, but I joined in 2006 and find I can only go back to sometime in 2009.
What happened to these posts and extrapolating, from one example, I am fairly sure this must have happened to other forum members?