So excited! I heard from Experian this morning about an item I disputed last month, and they investigated and removed it!
I took a close look at my CR last month for the first time in years - I've looked at it several times in recent years, but never this closely - and noticed that a SL that I rehabbed about five years ago was on my CR was in collection (as of whatever date - 2008 or something). When I rehabbed the loan, I was told that all negative info would be removed from my CR, so I disputed it. I'm so excited that it's gone - now I just need to fix or dispute a late payment from 2008 and I'll have no negative items on my CR! YAY!