[BUG?] SELECT STATEMENT ON COLUMN WITH NULLS

I apologize if this has been reported already but here it is anyway.

1) I have an ASCII column called STATUS that allows NULL.
2) There are 190k+ records with mixed values in this column.
3) Running the following query causes the column that has 
	the value of NULL to be filtered out which results in 
	a inaccurate count:

	select COUNT(*) from call 
	where status != 'CLOSED'

4) Running the following query allows the NULL values to be counted:

	select COUNT(*) from call 
	where status != 'CLOSED' OR STATUS IS NULL	

This occurs in both the SQL Studio as well as the JDBC driver and I will
guess that the ODBC driver is affected as well.

[Sys Info]
SAPDB v7.3.0.34 (ASCII) on SuSE v8.1


Please advise if this was previously reported and I simply missed it and
need to update to .40 of the server.

Thanks,

Kevin

"Those who would give up essential liberty to purchase a little temporary
safety deserve neither liberty nor safety."
     -Benjamin Franklin, 1759