I have 3 instances of my wallet on 3 different computers. All are at 3.01 now. Last night I blew away the blocks and chainstate folders on all of them. today, I have one wallet that seems to be current, and I used that to do a "send to self" transaction today. On the computer that I did the transaction on, everything is normal. On a second computer, my transaction list is missing the send to self transaction. On the third computer, I'm stuck synchronizing at 49 weeks behind. So things are rather....inconsistent right now.
Something similar happened to me. One wallet synced fine, one on another comp did not.
I just copied the blockchain data from the good instance over to the other wallet I have on another computer. I also made sure to add the connected nodes from the good one to the other. Seems to have worked.
The faster everyone switches to v3.0.1 the better, i still see a lot of folks on v3.0.0