I am seeing the following error that deals with the search scheduler I believe:

AssemblyVersion:7.3.4

PortalID:-1

PortalName:

UserID:-1

UserName:

ActiveTabID:-1

ActiveTabName:

RawURL:

AbsoluteURL:

AbsoluteURLReferrer:

UserAgent:

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:c5af234b-391e-4475-afb5-67f5f62f38a1

InnerException:Object cannot be cast from DBNull to other types.

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:System.DBNull.System.IConvertible.ToDateTime

StackTrace:

Message:

System.InvalidCastException: Object cannot be cast from DBNull to other types.
   at System.DBNull.System.IConvertible.ToDateTime(IFormatProvider provider)
   at System.Convert.ToDateTime(Object value)
   at DotNetNuke.Services.Search.UserIndexer.GetSearchDocuments(Int32 portalId, DateTime startDate)

There was a similar thread, and I've run Sebastien's script against the database, however it did not help (and the Method is different).

 Has anyone seen this before?