[OPEN-ILS-DEV] Back button creates double search rows

[Bill Ott]

In both the staff client and Firefox (I'm sure that's not a coincidence) 
using the back button (or Go Back) from an Advanced search, results in 
the search rows being double populated.  I've been able to replicate 
this in pretty much every skin, from PINES, to Conifer, to UPEI, to 
TADL.  The only exception I've found is GRPL's skin.

It's a minor issue, but it's driving me a bit nutty trying to track it 
down, especially since I've apparently already done something to cure it 
and can't figure out what.

Does anyone have any suggestions as to what might be causing this?