SharePoint Custom CSS Changes Not Appearing
This is a good one!... You create a new CSS file for SharePoint (based on a copy of SPS.CSS), save it to the same directory as SPS.CSS, then use the SharePoint Admin interface to tell SharePoint about it. You look at the UI and it looks great. Some users are reporting that the still see the old SharePoint (blues and oranges). You look at the pages and they looked customized. What gives?!
Check the permissions on the custom CSS file. Consider it an “override” of the SPS.CSS style sheet. If a user does not have permissions to read the file SharePoint will default to the original style. In this example, the new CSS file had Administrator read privileges... that's why some folks saw the changes and other didn't.