After updating InDesign CC 6-days ago started to have issue with all keyboard + mouse functions not working ex. shift key does not constrain proportions when scaling. A restart fixed the issue thr first time. Today I have installed latest update and shut down and restarted several times does not fix issue. On a MacBook pro running OS X Mavericks 10.9.2.
Disconnected extrenal devices ie keyboard and Wacom Bamboo tablet and restarted computer seemed to correct the issue.
Was having the same issue and your answer solved my issue! Thanks for posting your fix.