When inserting rows, it fails on any row that is a multiple of the page size.

The error is ​me.getPage(...) is undefined.

I think it might be slightly related to these lines. in linoweb.js

    // Height setting has no effect but to overcome the hasRange() error.
    // See : www.sencha.com/forum/showt...
    height : 100,

Before diving into this problem, I need to understand how we're using the extra phantom row to insert new rows.
Perhaps we want to change that.