We've had several users who have noticed that using a smart card on their system eventually causes authentication services to go out to lunch. Thus, when you click the lock icon in any App, you get nothing. No prompt, no unlock, just nothing. Rebooting fixes the issue, as does doing a kill -9 of securityd. This appears to happen on both 10.7 and 10.8 whether the smart card itself is being used by the Mac, or passed through to a windows VM. I'd like to file a bug on it, but duplicating the issue has been difficult up till now. I've seen it personally on my own machines, as well as getting reports of it from the field, but it seemed to be intermittent. I've discovered on at least one of my machine though that I can trigger the condition by unlocking the smart card in keychain access. Is this a known issue? Anyone else seeing this? Thanks, --DH