laravel/laravel — pull request #1353 by franzliedke (2012-10-15 21:15:30+00:00)
Title: Eloquent auth: Check whether token is an object.

This caused errors in some cases where for some reason PHP was thinking the returned value was a string.

I think this was caused by having two separate Laravel installations on localhost, with the same default cookie name.
I know, my fault, still hard to debug and somewhat annoying.