You need more control over the compressed output of Joomla! ?
Look no further.
By default this plugin disables the gzip compression of the html output of your Joomla! site for the User Agents of Facebook and LinkedIn (those are the BOTs that scan your site everytime someone posts a link to Facebook or LinkedIn).
Also you can specify easily your own User Agents (BOTs most of the time) that feel happier with plain uncompressed html!
The Bots of Facebook and LinkedIn have a cap on the size that they scrap, which in many cases have undesirable effects with compressed pages.
Install, activate and forget about it...