When using pathauto and you've set it that your blog looks like "blog/[yyyy]/[mm]/[dd]/[title]", in the overview "domain/blog" the pathes generated by nodeteaser are wrong ("domain/blog/blog/yyyy/mm/...").

So in line 159 of nodeteaser-Module, there should be inserted a slash in front of {path} variable:
$output .= "<p><a href=\"/{$path}\">continue reading \"".$node->title."\"</a></p>";