The new I0coin-qt client (from post# 1652) is working fine too.  I just downloaded the entire block chain with no problems.  Has anyone tried mining with the new client?  I don't know if it had anything to do with the crash.  It's more likely because of two different client versions being used for mining at the same time.  Maybe the BIP16 & BIP30 patches kicked in before the 1 Oct 2012 deadline.  If the new client works miners should be migrating to it to eliminate conflicts between the two.