Gavin Andresen - 2010-12-09 00:48:45

@s{quotedtext} @s{quotedtext}
There's been exactly one block with non-standard transactions:
  http://blockexplorer.com/b/71036
... and it contained no fees.

HOWEVER:  jgarzik, you're over-reacting, too.  This will not cause a block chain split; all clients will accept blocks containing non-standard transactions as valid.  Most (many?) just won't put non-standard transactions in blocks that they generate, and won't relay them.  There will be no havoc.