Fixed bug in FixStringValue() in JetDbCommand.cs where exception with desc: "String not recognized as a valid DateTime" would be thrown if p.Value.ToString() was empty. Also upgraded nHibernate to v3.1.0.4000

[Geddon]

private void FixStringValue(IDataParameter p)
{
if (!_convertedDateParameters.Contains(p))
return;

  -->      if (!string.IsNullOrEmpty((p.Value ?? String.Empty).ToString()))
        {
            //Someimes two pass conversion makes a parameter value
            //of type DateTime to be of String Dbtype
            DateTime date = DateTime.Parse(p.Value.ToString());
            p.Value = GetNormalizedDateValue(date);
        }
    }

[tgmayfield]

James's git repository here is just a copy of NHContrib. NHibernate.JetDriver isn't getting any support from core devs, so there's been a few independent efforts to get it up to date. My own is at https://github.com/tgmayfield/nhibernate.jetdriver and has your fix above as well as others, thought it's set up for NH 3.2. You can do as you wish, but I know of a couple other people that have gone through the same level of effort, and I'm all about not wasting another person's time on it. :)

I've volunteered to become the new maintainer for NHibernate.JetDriver on the dev list, but it seems like nobody can really decide what to do.