Installing the DNN 4.8.1 update on my staging server over a 4.7 installation yields an error in the 4.8.1 sql provider file:

System.Data.SqlClient.SqlException: For DROP INDEX, you must give both the table and the index name, in the form tablename.indexname.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at DotNetNuke.Data.SqlDataProvider.ExecuteADOScript(String SQL)
   at DotNetNuke.Data.SqlDataProvider.ExecuteScript(String Script, Boolean UseTransactions)

DROP INDEX IX_ScheduleHistory ON dbo.ScheduleHistory

Yeah, I ended up removing that line from the script and then running it on my staging server (manually removed the index on that table as well), but this definitely needs to be fixed and redeployed for the masses.  I've been holding off upgrading to 4.7+ on my live server because of the "multiple controls with id..." error that has started surfacing lately (and I've only seen it in 4.7+) but testing things on my staging server in the meantime. 

thanks, i've posted this in the core forums, so it can be picked up

Cathal