I am currently looking at an interesting issue with a WSS 3 standalone instance. Up until late last week all was working with well. Users are now reporting issues. Users with Full Control access can't see various menu items and when the add documents they get an access denied error message.
The obvious first step was to confirm that the permissions were not altered. I confirmed this all looked good and that the libraries that they were adding to were set up with the right inheritence etc. The only thing that IT confirmed was that they did apply security updates to the app server and domain controllers.
I am suspecting something else ast the problem. They are really unclear on what if anything might of been done on the AD level that might of introduced this.
Is there anything else that I might be able to point my finger on?