Hi all! Since Npgsql RC1, we started to receive some error reports about problems when closing connections. The typical stack trace looked like this: System.NotSupportedException : This stream does not support seek operations. at System.Net.Sockets.NetworkStream.Seek(Int64 offset, SeekOrigin origin) at System.IO.BufferedStream.FlushRead() at System.IO.BufferedStream.WriteByte(Byte value) − at Npgsql.NpgsqlQuery.WriteToStream(Stream outputStream) in C:\Npgsql\Npgsql2\src\Npgsql\NpgsqlQuery.cs:line 62 − at Npgsql.NpgsqlReadyState.QueryEnum(NpgsqlConnector context, NpgsqlCommand command) in C:\Npgsql\Npgsql2\src\Npgsql\NpgsqlReadyState.cs:line 64 − at Npgsql.NpgsqlConnector.ReleasePlansPortals() in C:\Npgsql\Npgsql2\src\Npgsql\NpgsqlConnector.cs:line 373 − at Npgsql.NpgsqlConnectorPool.UngetPooledConnector(NpgsqlConnection Connection, NpgsqlConnector Connector) in C:\Npgsql\Npgsql2\src\Npgsql\NpgsqlConnectorPool.cs:line 541 − at Npgsql.NpgsqlConnectorPool.ReleasePooledConnector(NpgsqlConn...