I don't want to come across as negative. The concept of this bar is superb - both the fast loading and the floating nature are FANTASTIC features. However...
Looking at this page:
When I hover my mouse over the Floating Social Bar the Facebook and Google+ icons disappear for several seconds (can be up to five). Eventually they re-appear. I assume that the interval between the events allows for the loading of the real Facebook and Google+ buttons.
If I were a visitor, this would definitely put me off clicking (I'm not sure I'd bother going back to click after the buttons had gone).
Is this normal for this plug-in? It could be something peculiar with my machine/connection/browser.
If it's normal, would a better strategy be to load the real buttons a second or two after the whole page has finished loading?