Chrome Bug Menu Glitch affecting WordPress menus

A bug in Google Chrome 45 Stable build is affecting WordPress Admin menus. Here’s a fix!

If you use Chrome and have updated to the latest Chrome 45 Stable build, you may have noticed your WordPress admin menus are a little messed up and are missing tabs or at times tabs seem to be stacked on top of each other or misaligned.

NOTE – This post refers to ‘Admin Menus’ only, the front end menus of your site should be unaffected.

Thanks to a tip from Tom Rodman, I learned that the there is a bug in the stable build of Chrome 45 that is causing the issue. The bug resides in the Slimming Paint code which was set to be enabled by default in Chrome 45. Slimming Paint is new code within Chrome that is supposed to “result in a drastic simplification of the way that composited layers are represented in Blink and cc, which in turn will yield improved performance, correctness and flexibility,” except in this case it just plain made WordPress Admin menus a mess for some people.


Thankfully there’s a fix, as reported by the fine folks over at WP Tavern.

To disable this feature, visit chrome://flags/#disable-slimming-paint in Chrome and Enable the Disable slimming paint option, and make sure the other two Enable options are disabled because they will override the Disable option.

The image below shows the flags you need to look for — all three flags should read “Disable” once you’ve toggled them. For whatever reason, I couldn’t locate the second “Enable Slimming Paint Phase 2” option so the fix isn’t working for me.


After you’ve enabled/disabled the appropriate flags, restart your Chrome browser and you should be all fixed up. There’s also a server side fix you can install available over on GitHub if you’d prefer to use that instead — which did indeed fix the issue for me, and is a lot easier than asking a number of users to enable or disable Chrome flags.

With WordPress being used by nearly 75 million websites around the world, this is “a pretty big ‘whoops’” as Tom put it.

Are you experiencing the Chrome bug that’s affecting your WordPress admin panel menus? If so did the fix work for you? Let us know in the comments below, or on Google+, Twitter, or Facebook.

Thanks for the tip Tom!

Full story here

1 reply
  1. Julia
    Julia says:

    Within the last five weeks, several people have reported an issue in Chrome that breaks the WordPress admin menu. If you hover the mouse cursor over menu itemsin the sidebar, they ll occasionally fall out-of-place.


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