Quote
If 950 of the last 1,000 blocks are version 2 or greater, reject all version 1 blocks
We are getting close to that threshold: 821 out of the latest 1000 blocks were version 2.
If you are mining in a pool: there is a list of pools and what versions they are producing here. If your pool is producting version=1 blocks, you should urge your pool operator to upgrade or patch.
If you are mining with p2pool or solo and using a very old version of bitcoind: you should upgrade, or you risk your blocks getting orphaned.