This weekend Microsoft worked on updating adCenter and while doing so, it ended up creating two major loop holes. During their efforts of updating, they broke two of the important functionalities in their system. First loop hole, it has become difficult to make changes to your campaigns as adCenter shows an error while you try to do so.
The second loop hole, even the keyword import isn't functioning right. While you attempt to insert a CSV file containing more than 3,000 keywords, once again it shows an error in the process. When this was reported to officials at Microsoft, assurance was given that it will be fixed soon. Interestingly, a forum discussion on WebmasterWorld gives the exact figure of 500 keywords that can be uploaded at one time. If this is the quantity restriction in so called 'Bulk Upload' then – Why do they call it Bulk upload?