Just wondering would anyone have any idea what would cause the fix_cache_key.php file not to load.

I have placed it in my site root (the store and therefore the index.php is also in site root) and verified it has been uploaded to the server. When I set my browser to mysite/fix_cache_key.php

On Firefox I get:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

On IE I get a generic can't connect page

And on Chrome I get Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error.

I am trying to get to the source of why our site is running very slowly on an intermittent basis.

Cheers