I'm having an odd issue with my ASA 5510. 3-5 times a week a number of users will complain they can no longer access the internet, they have local network access but are unable to get past the inside interface of my ASA 5510. The only way to restore access is to clear xlate on the ASA, and then everyones' connection is immediately back online. It doesn't impact all users, just a few at any time but it is different users. My ASA is using 8.2.1.