Quote from: theymos on June 14, 2010, 02:34:57 AM
In case the weakening of SHA-256 is gradual instead of sudden (much more likely, IMO), BitCoin could stretch the process of switching to a different hash algorithm over a long time. First accept SHA-512 (or whatever) in addition to SHA-256, then use SHA-512 by default, and finally stop accepting SHA-256 for new blocks.
Wouldn’t the users lose their coins?