Here's the latest findings. I'm sure no one has moved those files into the /dbs directory.

Code:
RMAN> change archivelog until time 'sysdate-1' delete;

using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=130 device type=DISK
List of Archived Log Copies for database with db_unique_name ORCL
=====================================================================

Key     Thrd Seq     S Low Time 
------- ---- ------- - ---------
96      1    38      A 26-APR-09
        Name: /u01/app/oracle/product/11.1.0/db_1/dbs/arch1_38_682014240.dbf


Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/u01/app/oracle/product/11.1.0/db_1/dbs/arch1_38_682014240.dbf RECID=96 STAMP=685550413
Deleted 1 objects