I've had the same problem happen to me twice now with two different members. Basically, what happened is I had a conversation going with via PM on the old forum software. I then received a response that showed up in my email inbox, but it didn't show up in my conversations folder on here. Clicking on the link in the email leads me to a dead end. Overall, I actually really like the new conversation set-up as it makes it easier to keep track of discussions and find what's been said in the past without having to deal with digging back through my folder(I have some conversations that I have been going on several months now). With that said, though, the migration "teething pains" have been a bit of a problem, especially since both involved a seller communicating either on something I'd already bought or was trying to buy.