Because that data is stored in the database, even if the original bug has been fixed you may still have links in the database pointing to the old (wrong) location.

I'm not sure how you would have ended up with links to course/view.php in the database - perhaps a local customisation?

I think the only way to get that fixed would be to run a query on the database to replace the old links with new ones. The data is stored in the 'description' field of the 'event' table.

Simon