Strange ACLs on OS X System
The CrashPlan.app does not have an ACL. The output of ls is consistent, you must have misread it.


When you run ls -a in the parent directory, it tells you that . (i.e. the parent of CrashPlan.app) has extended attributes, and that CrashPlan.app has no ACL (mode string rwxrwxr-x).
When you run ls -a inside CrashPlan.app, it tells you that . (i.e. the CrashPlan.app directory) has no ACL (mode string rwxrwxr-x), and that .. (i.e. the parent directory) has extended attributes.


The parent directory does not have an ACL, but it has extended attributes com.apple.backupdelta.MoveChecked and com.apple.s stem.Security. This second attribute is odd: it should be com.apple.system.Security. This is a sign that your filesystem may be corrupted.