9.0.1.0.1 sqlplus登入（不同使用者）v$version居然不一樣 ？

CODE:

SQL*Plus: Release 9.0.1.0.1 - Production on Thu Dec 27 10:29:25 2007
(c) Copyright 2001 Oracle Corporation.  All rights reserved.

Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
PL/SQL Release 9.2.0.6.0 - Production
CORE    9.2.0.6.0       Production
TNS for 32-bit Windows: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
SQL> conn system
Enter password: *************
Connected.
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.0.1.1.1 - Production
PL/SQL Release 9.0.1.1.1 - Production
CORE    9.0.1.1.1       Production
TNS for 32-bit Windows: Version 9.0.1.1.0 - Production
NLSRTL Version 9.0.1.1.1 - Production
SQL> conn scott
Enter password: *****
Connected.
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.0.1.1.1 - Production
PL/SQL Release 9.0.1.1.1 - Production
CORE    9.0.1.1.1       Production
TNS for 32-bit Windows: Version 9.0.1.1.0 - Production
NLSRTL Version 9.0.1.1.1 - Production
SQL> conn F3710268
Enter password: ***********
Connected.
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
PL/SQL Release 9.2.0.6.0 - Production
CORE    9.2.0.6.0       Production
TNS for 32-bit Windows: Version 9.2.0.6.0 - Production
NLSRTL Version 9.2.0.6.0 - Production
SQL>


透過OEM  ,  SYS登入看到的也是 9.0.1.1.0  版本。 暈 。 正在檢視中，同事的一個測試庫， 據說沒有安裝過兩次oracle, windows , path  ,  目錄 ， 登錄檔都檢查了， 實在沒有 9.2.0.6 的影子 。  奇怪 。

pc 中病毒了， 其中一個 oraclient9.dll 損壞 。  sqlplus 用不了，只能用 sqlplusw .