Do tenure-track search committees using mathjobs.org receive revisions to job applications after the initial submission date?
It's relatively easy to download a set of applications from mathjobs.org as a huge .pdf file.  In our last search, the committee members looked at the applications in that way rather than looking at them online.  Thus in our first round of evaluations we would have missed any updates that were submitted after the deadline.  For candidates that made it to the phone interview stage, we did keep track of updates to the application, but in most cases the applicant sent us an email saying "...  Also, my paper XXXX was just accepted for publication in YYYY..."  

Thus I wouldn't count on any update to your mathjobs application that comes after the deadline being seen by the search committee.  If you do update the appliction, you should probably send an email to the search committee chair.