Safari 8.x.x - MissingControllerException

Hi all, 

I have a weird problem at the moment. 

I'm normally using Firefox, and there everything is working perfectly. 

Now I was testing on Safari and I got the following error: 

2015-01-16 15:56:13 Error: [MissingControllerException] Controller class Apple-touch-icon-precomposed.pngController could not be found.

Exception Attributes: array (

  'class' => 'Apple-touch-icon-precomposed.pngController',

  'plugin' => NULL,

)

Request URL: /apple-touch-icon-precomposed.png

Stack Trace:

#0 /private/reagentdb/app/webroot/index.php(109): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))

#1 {main}

2015-01-16 15:56:13 Error: [MissingControllerException] Controller class Apple-touch-icon.pngController could not be found.

Exception Attributes: array (

  'class' => 'Apple-touch-icon.pngController',

  'plugin' => NULL,

)

Request URL: /apple-touch-icon.png

Stack Trace:

#0 /private/reagentdb/app/webroot/index.php(109): Dispatcher->dispatch(Object(CakeRequest), Object(CakeResponse))

#1 {main}

If I click any link within the system I get logged out again with the error log above. I never encountered that before and on Firefox everything is working fine. Now I tested on a colleagues Mac and there it works fine… 

He's using 7.x.x and I'm using 8.0.2. 

Nowhere in my code I'm calling any touch-icons, so the problem must come from Safari, right? 

Anyone experienced the same problem? Or can give some helping hand? 

Thanks a lot! 

Sajoscha