Does old consumer api supports 0.10 message format after jar update ?

[Vadim Keylis]

Hello Everyone. We are in the process of upgrading our brokers and
consumers from 0.8.1.1 to 0.10. Our consumer use 0.8 high level or simple
consumer api.  Will old consumer api support new message format introduced
in 0.10 after we upgrade consumer jars to 0.10?

Thanks so much in advance