A couple of questions;

Firstly, I loaded up my wallet to get my latest transactions from 1Gh, and noticed it wasn't syncing, and is showing;

"Warning: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade."

There is no upgrade to the wallet though.
Is this because I closed it down mid-sync before? If so, do I fix it by deleting all the .dat files (except for wallet.dat obv)?

Secondly, I updated my cgminer to the latest one, and along with the old "Stratum from pool 0 detected new block", I have started getting "New block detected on network before longpoll".

A little education please - what does that mean?