Share problems

Strange thing this. A user ‘suddenly’ couldn’t enter several shared drives on a Win2000 server which was installed weeks ago. It turned out share permissionsand directory permissions were allright; only the root dir only had admin allowance. This means everyone was perfectly able to access files with known paths inside the share ( call it deeplinking if you want). But entering from the upside down is another matter. What was strange though is that nobody noticed this earlier. Seems people work a lot from their bookmarks here