This morning, Adobe kindly alerted me of an update available for Flash to take it to version 184.108.40.206.
The update breaks Flash.
DO NOT run this update, at least until Adobe solves whatever is causing the plugin to fail. Several readers of Overthought.org have reported that this update completely breaks Flash for Safari on OS X 10.9 Mavericks. I have also personally experienced this issue.
However, if you have already run the update, there is hope.
This might be a good opportunity to go "Flashless" on your Mac. There are several benefits to going Flashless, including reduced CPU usage and reduced power usage, as Flash is a huge resource and energy hog. If you're using a Macbook, removing Flash could possibly increase your battery life.
Here are a couple of great guides to get you up and running without Flash, at least until Adobe releases a fix:
- Wrangling Safari, Flash, and Chrome by the Macinstructor — Friend Rick Stawarz gives an easy-to-follow guide to get rid of Flash.
- Going Flash-Free on Mac OS X, and How to Cheat When You Need It from Daring Fireball — A lengthy guide from John Gruber to do the same.
Now get back to watching those cat videos on YouTube.