Over the last month numerous users have noticed a bug in Chrome 45 that breaks the WordPress admin menu, if Slimming Paint is enabled. The bug causes WordPress menu items in the sidebar to fall out of place when they’re hovered over. While it’s not a huge issue, it’s certainly annoying. Luckily, however, it can be temporary fixed by disabling Slimming Paint in Chrome.
The team behind Chrome have confirmed they’re aware of the issue and a fix will be included in the Chrome 47 release. Full details have been posted on Chromium, which confirms exactly what went wrong and provides further details on how the issue can be resolved. So if you’ve noticed your WordPress admin menu behaving strangely since you updated Chrome, you’re not alone!