+1 I would too. I'm only finding references that it is a problem: [[1]](http://books.google.com/books?id=uI-DOdqB-NoC&pg=PA141&lpg=PA141&dq=typeof+regex+function&source=bl&ots=oOHWM0BH7e&sig=DTd-mr5KMTjIQhrOK3J6LKcsYhw&hl=en&sa=X&ei=0TiIUY2bJ_Gp0AHXg4CIDQ&ved=0CHAQ6AEwBzgK#v=onepage&q=typeof%20regex%20function&f=false) [[2]](https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/typeof#Regular_expressions) [[3]](https://github.com/documentcloud/underscore/blob/1.4.4/underscore.js#L960-L965) [[4]](https://github.com/documentcloud/underscore/issues/908#issuecomment-11494064)