It would be nice if the active members of the community published useful information here.
And do not just go, look ...
Briefly ...
- It's complicated.

- CC released a commit that added checkpoints, but staking and mining can still lead to forking.
- I didn't fully understand the cause of this, even though he mentioned it at some point.
- He's currently working to implement a "full" fix.
- Conclusion is: Wait for the fix, then you need to resync or get the bootstrap files if you have opened your wallet after Nov 1st.