The following is suggestions based on Google page speed to your plugin:
I seems the plugin loads the Twitter buttons from different URL's which create duplicate downloaded bytes and additional RTTs. This will lower a sites page ranking according to Google and I therefore think it could merit a fix:
Google Page speed says:
The following resources have identical contents, but are served from different URLs. Serve these resources from a consistent URL to save 2 request(s) and 34.8KiB.
The following resources have identical contents, but are served from different URLs. Serve these resources from a consistent URL to save 2 request(s) and 4.6KiB.
Also, I use the compact twitter "tweet" button but the .css file given by this plugin has a minimum height which is a layoutproblem when I don't use the counter of tweets. There's simply too far a gap between my socialize buttons.
Hope you will look at these