New versions are improved in speed or compression ratio. Lossless means lossless. Any FLAC file is identical to its source, just future versions of FLAC might produce smaller files in less time.

Ah, okay.. So If I encode something today, with 1.1.0, it'll be acoustically identical (barring any HD errors, or other 'acts of nature') to the same track done 5 years down the road with version 3.x.x?

Coooll.. that was what I was wantign to hear.

Thanks!