In the console debug window, type:
getblockhash 2210496
Height 2210496 is a hardcoded checkpoint, so if you have the correct hash then you're on the right chain (or at least, the chain that the person adding the checkpoint to the source code deemed was right.)
its said
17:24:38

aff2a71586bedd49e55167a72b1f71bf4f3cc8bc638aed3436f17d69fe3e2ba8
You're not on the same chain as the hardened checkpoint, then.

What's the value you see for:
getblockhash 2240000In my case it's d4065b408236f6189b9fb9fac9e94e5c73b3cfa441671dde720b279246c739b7, but that's not the chain with the most work. Just wondering if you and I ended up on the same fork.
Block number out of range. (code -1)