I'm using the Share Button, and I have encountered a few problems.
First: my application needs to add the button dynamically. However, the documentation assumes that the button will be included in the web page statically. I was able to solve this, but it's a hack. First, I load in.js at the top of the page. Then, wherever I want to display a Share button I add the "IN/Share" script and call IN.init(). However, this function is undocumented and I'm afraid it may disappear at any moment. Please add an official way to add the button dynamically. (I saw your suggestion to use IN.Parse() at https://developer.linkedin.com/thread/2936 , but that function is also undocumented.)
VP R&D, Kitely Ltd.