I was browsing through your article on keyboard shortcuts (“Top Keyboard Shortcuts in SQL Server Management Studio Express,”
http://www.sqlmag.com/Articles/ArticleID/94458/94458.html ) and saw that you mentioned you can comment a line by using just Ctrl+C. This is not the case. You must first use Ctrl+K, then press Ctrl+C (second chord as they say) to comment out the statement.
You're absolutely right. The Crtl+C and Ctrl+U keyboard shortcuts that comment and uncomment lines must be preceded by the Ctrl+K key, making them two-part shortcuts.