In comm.c find the read_from_descriptor function and find this

      if( nRead > 0 )
      {
         iStart += nRead;

         /* Update the incomm here before adding more to the line etc */
         update_transfer( 1, nRead );

         if( d->inbuf[iStart - 1] == '\r' || d->inbuf[iStart - 1] == '\n' )
            break;
      }

change it to this

      if( nRead > 0 )
      {
         iStart += nRead;

         /* Update the incomm here before adding more to the line etc */
         update_transfer( 1, nRead );

         if( d->inbuf[iStart - 1] == '\r' || d->inbuf[iStart - 1] == '\n' )
            break;

         /* Reached limit so have to let it carry on */
         if( iStart >= ( sizeof( d->inbuf ) - 10 ) )
            break;
      }

If your using a client that holds a lot of text and then sends it all at once like the latest Zmud client or if you used telnet and entered a lot of text without hitting enter, the recv function starts returning 0 once its already put all it can into d->inbuf and this causes it to kick the connection thinking it is getting an EOF.

This affects SMAUG and probably all that use this read_from_descriptor.