From the Readme.txt file:
* default tag is now div
This means that if you do not assign a tag attribute in your shortcode, it will revert to the default value that has been set in the plugin options page. In past versions this has defaulted to span. Moving forward, the default value on new installs will be div. For those that are upgrading (such as yourself) this will not affect you, as the default tag was already set as span and will remain that way, unless you have changed it... regardless the settings in the page options will remain the same after an update.
* scripts only load if shortcode is in use
* script loaded in footer
Loading scripts in the header adds to the overhead that must be loaded before the page content loads. We have decided to move the script to load AFTER the page content to not get in the way of faster page loads.
* loading js and css now hooked to wp_enqueue_scripts rather than init
Once upon a time, back before we had the wp_enqueue_script, we used the init hook for script enqueueing. Init was too soon and could affect performance, so now we have the wp_enqueue_scripts hook, and that's what we now use.
* added Serbian language
The title pretty much says it all.