I also tend to assume user error as well but putting that in your readme will make you seem more approchable. :)

I bought something from a well known merchant that was zipped up horribly with his name as the first file in the path. I couldn't be unzipped properly but the item had been in the market place for a while so either no one told him or he didn't care to fix it. I couldn't imagine how he would react to me saying something when his item had been around as long as it had.

...... Kendra