FRA: Flashback logs are not being deleted when space is needed for archive logs (Doc ID 1481739.1)

ORA-19815: WARNING: db_recovery_file_dest_size of 524288000 bytes is 100.00% used, and has 0 remaining bytes available.
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You have following choices to free up space from flash recovery area:
1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard,
  then consider changing RMAN ARCHIVELOG DELETION POLICY.
2. Back up files to tertiary device such as tape using RMAN
  BACKUP RECOVERY AREA command.
3. Add disk space and increase db_recovery_file_dest_size parameter to
  reflect the new space.
4. Delete unnecessary files using RMAN DELETE command. If an operating
  system command was used to delete files, then use RMAN CROSSCHECK and
  DELETE EXPIRED commands.
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Errors in file /<PATH>/orcl_arc2_15324.trc:
ORA-19809: limit exceeded for recovery files
ORA-19804: cannot reclaim 5242880 bytes disk space from 524288000 limit
ARC2: Error 19809 Creating archive log file to '+<FRA DISK GROUP>'

SQL> alter session set NLS_DATE_FORMAT='DD-MON-YYYY HH24:MI:SS';
        set linesize 132 serveroutput on pagesize 50000
        select * from v$FLASHBACK_DATABASE_LOGFILE;
        select * from V$FLASHBACK_DATABASE_STAT;
        select * from V$FLASHBACK_DATABASE_LOG;

NAME                                                    LOG#       THREAD#    SEQUENCE#  BYTES      FIRST_CHANGE# FIRST_TIME
---------------------------------------------------- ---------- ---------- ---------- ---------- ------------- --------------------
+<FRA DISK GROUP>/log_1.261.782829073        1          2          6          15941632   1048169       10-MAY-2012 10:00:04  lowest log sequence# listed
...
+<FRA DISK GROUP>/log_60.339.782904711     60         1          103        15941632   1045574       10-MAY-2012 09:31:51 highest log sequence# listed.