First of all, great plugin.
I have done some modifications to your plugin as I'm importing quite a large shop from another platform. Now I have run into a little, and properly trivial, problem.
I noticed that I'm having problems with special characters, like æøå. If the importer hits any of these characters it simply stops the import of that field. Hence it is only importing a part of the string.
Is this something you have experienced before? And if so, is there possibly a quick fix to this, maybe to define the charset somewhere.