I have MAMP PRO (version 2.1.1) installed on my iMac for local web development projects. I recently installed this blog on my development environment to be able to start developing a new theme. For my surprise, everything seemed to work ok until I logged in with Chrome (version 21.0.1180.89). The whole admin interface exploded.
I tried clearing all browser data with no help. I tried reinstalling WordPress, but it didn’t help either. I disabled WordPress plugins, no help. There was nothing weird in the logs, just alerts about missing favicons. PHP (5.4.4) cache is off, but to be honest, I don’t know enough about Apache and PHP caching or configuration to be able to trace this issue there.
Then I noticed this comment on Stack Overflow:
Well this is really strange. I opened the local site with a “incognito window” of Chrome and the problem dissapeared :S
I gave it a try and, ta-da, problem vanished.
Would be nice to know what was causing it. Something I didn’t try, was to disable all Chrome extensions. A faulty extension could explain why it worked in incognito mode.
The reason for this bug is most likely AdBlock plugin. The WordPress admin interface will load correctly after disabling AdBlock.