Thanks, that's interesting. I wish I had written the type of the parameters into the log, but I'm pretty sure that the first 4 dates are java.util.Date and the last two are java.sql.Timestamp. I suspect that the remaining value "2012-12-06T08:00:00.000Z" is the problem. Anything different about date_used that you can figure?

I will try to reproduce this scenario here.

Matt