[ZODB-Dev] Inconsistent use of ConflictError

[Jeremy Hylton]

I'm +1, 

but I'm a little concerned about backwards compatibility.  What
happens if we change this in Zope, and someone tries to use a
third-party storage with the old calling conventions?  Do you think it
will break?  The worst that can happen, I suspect, is that the
ConflictError instance could be initialized incorrectly.  Since no old
code could use the new interface, this might be a fairly limited
problem.  Anything else?

Jeremy